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check_unsafe_exec() doesn't care about signal handlers sharing
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 66static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 68
1da177e4 69/* Prevent leaks of NFSv4 errors into userland */
46f72f57 70static int nfs4_map_errors(int err)
1da177e4
LT		 71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 74 __func__, -err);
1da177e4
LT		 75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
4e769b93 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
4e769b93 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
65de872e
TM		 196static int nfs4_wait_bit_killable(void *word)
197{
198 if (fatal_signal_pending(current))
199 return -ERESTARTSYS;
200 schedule();
201 return 0;
202}
203
204static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205{
206 int res;
207
208 might_sleep();
209
e005e804 210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
65de872e 211 nfs4_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 212 return res;
213}
214
215static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216{
217 int res = 0;
218
219 might_sleep();
220
221 if (*timeout <= 0)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
227 res = -ERESTARTSYS;
228 *timeout <<= 1;
229 return res;
230}
231
232/* This is the error handling routine for processes that are allowed
233 * to sleep.
234 */
235static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
236{
237 struct nfs_client *clp = server->nfs_client;
9e33bed5 238 struct nfs4_state *state = exception->state;
65de872e
TM		 239 int ret = errorcode;
240
241 exception->retry = 0;
242 switch(errorcode) {
243 case 0:
244 return 0;
9e33bed5
TM		 245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
248 if (state == NULL)
249 break;
250 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
256 if (ret == 0)
257 exception->retry = 1;
258 break;
259 case -NFS4ERR_FILE_OPEN:
260 case -NFS4ERR_GRACE:
261 case -NFS4ERR_DELAY:
262 ret = nfs4_delay(server->client, &exception->timeout);
263 if (ret != 0)
264 break;
265 case -NFS4ERR_OLD_STATEID:
266 exception->retry = 1;
267 }
268 /* We failed to handle the error */
269 return nfs4_map_errors(ret);
270}
271
272
26e976a8 273static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 274{
7539bbab 275 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 276 spin_lock(&clp->cl_lock);
277 if (time_before(clp->cl_last_renewal,timestamp))
278 clp->cl_last_renewal = timestamp;
279 spin_unlock(&clp->cl_lock);
280}
281
38478b24 282static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 283{
38478b24 284 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 285
38478b24 286 spin_lock(&dir->i_lock);
40d24704
TM		 287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
288 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 289 nfs_force_lookup_revalidate(dir);
40d24704 290 nfsi->change_attr = cinfo->after;
38478b24 291 spin_unlock(&dir->i_lock);
1da177e4
LT		 292}
293
e56e0b78 294struct nfs4_opendata {
c6d00e63 295 struct kref kref;
e56e0b78
TM		 296 struct nfs_openargs o_arg;
297 struct nfs_openres o_res;
cdd4e68b
TM		 298 struct nfs_open_confirmargs c_arg;
299 struct nfs_open_confirmres c_res;
e56e0b78
TM		 300 struct nfs_fattr f_attr;
301 struct nfs_fattr dir_attr;
ad389da7 302 struct path path;
e56e0b78
TM		 303 struct dentry *dir;
304 struct nfs4_state_owner *owner;
aac00a8d 305 struct nfs4_state *state;
e56e0b78 306 struct iattr attrs;
26e976a8 307 unsigned long timestamp;
3e309914 308 unsigned int rpc_done : 1;
24ac23ab
TM		 309 int rpc_status;
310 int cancelled;
e56e0b78
TM		 311};
312
2ced46c2
TM		 313
314static void nfs4_init_opendata_res(struct nfs4_opendata *p)
315{
316 p->o_res.f_attr = &p->f_attr;
317 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 318 p->o_res.seqid = p->o_arg.seqid;
319 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 320 p->o_res.server = p->o_arg.server;
321 nfs_fattr_init(&p->f_attr);
322 nfs_fattr_init(&p->dir_attr);
323}
324
ad389da7 325static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 326 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 327 const struct iattr *attrs)
328{
ad389da7 329 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 330 struct inode *dir = parent->d_inode;
331 struct nfs_server *server = NFS_SERVER(dir);
332 struct nfs4_opendata *p;
333
334 p = kzalloc(sizeof(*p), GFP_KERNEL);
335 if (p == NULL)
336 goto err;
337 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
338 if (p->o_arg.seqid == NULL)
339 goto err_free;
ad389da7
TM		 340 p->path.mnt = mntget(path->mnt);
341 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 342 p->dir = parent;
343 p->owner = sp;
344 atomic_inc(&sp->so_count);
345 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 346 p->o_arg.open_flags = flags;
347 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 348 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 349 p->o_arg.id = sp->so_owner_id.id;
ad389da7 350 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 351 p->o_arg.server = server;
352 p->o_arg.bitmask = server->attr_bitmask;
353 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 354 if (flags & O_EXCL) {
355 u32 *s = (u32 *) p->o_arg.u.verifier.data;
356 s[0] = jiffies;
357 s[1] = current->pid;
358 } else if (flags & O_CREAT) {
359 p->o_arg.u.attrs = &p->attrs;
360 memcpy(&p->attrs, attrs, sizeof(p->attrs));
361 }
cdd4e68b
TM		 362 p->c_arg.fh = &p->o_res.fh;
363 p->c_arg.stateid = &p->o_res.stateid;
364 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 365 nfs4_init_opendata_res(p);
c6d00e63 366 kref_init(&p->kref);
e56e0b78
TM		 367 return p;
368err_free:
369 kfree(p);
370err:
371 dput(parent);
372 return NULL;
373}
374
c6d00e63 375static void nfs4_opendata_free(struct kref *kref)
e56e0b78 376{
c6d00e63
TM		 377 struct nfs4_opendata *p = container_of(kref,
378 struct nfs4_opendata, kref);
379
380 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 381 if (p->state != NULL)
382 nfs4_put_open_state(p->state);
c6d00e63
TM		 383 nfs4_put_state_owner(p->owner);
384 dput(p->dir);
31f31db1 385 path_put(&p->path);
c6d00e63
TM		 386 kfree(p);
387}
388
389static void nfs4_opendata_put(struct nfs4_opendata *p)
390{
391 if (p != NULL)
392 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 393}
394
06f814a3
TM		 395static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
396{
06f814a3
TM		 397 int ret;
398
06f814a3 399 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 400 return ret;
401}
402
dc0b027d 403static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 404{
405 int ret = 0;
dc0b027d
TM		 406
407 if (open_mode & O_EXCL)
408 goto out;
409 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 410 case FMODE_READ:
411 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 412 break;
413 case FMODE_WRITE:
414 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 415 break;
416 case FMODE_READ|FMODE_WRITE:
417 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
418 }
dc0b027d 419out:
6ee41268
TM		 420 return ret;
421}
422
dc0b027d 423static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 424{
dc0b027d 425 if ((delegation->type & fmode) != fmode)
aac00a8d 426 return 0;
15c831bf 427 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 428 return 0;
b7391f44 429 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 430 return 1;
431}
432
dc0b027d 433static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 434{
dc0b027d 435 switch (fmode) {
e7616923
TM		 436 case FMODE_WRITE:
437 state->n_wronly++;
438 break;
439 case FMODE_READ:
440 state->n_rdonly++;
441 break;
442 case FMODE_READ|FMODE_WRITE:
443 state->n_rdwr++;
444 }
dc0b027d 445 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 446}
447
dc0b027d 448static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 449{
450 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
451 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
452 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 453 switch (fmode) {
003707c7
TM		 454 case FMODE_READ:
455 set_bit(NFS_O_RDONLY_STATE, &state->flags);
456 break;
457 case FMODE_WRITE:
458 set_bit(NFS_O_WRONLY_STATE, &state->flags);
459 break;
460 case FMODE_READ|FMODE_WRITE:
461 set_bit(NFS_O_RDWR_STATE, &state->flags);
462 }
e7616923
TM		 463}
464
dc0b027d 465static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 466{
8bda4e4c 467 write_seqlock(&state->seqlock);
dc0b027d 468 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 469 write_sequnlock(&state->seqlock);
003707c7
TM		 470}
471
dc0b027d 472static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 473{
8bda4e4c
TM		 474 /*
475 * Protect the call to nfs4_state_set_mode_locked and
476 * serialise the stateid update
477 */
478 write_seqlock(&state->seqlock);
003707c7
TM		 479 if (deleg_stateid != NULL) {
480 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
481 set_bit(NFS_DELEGATED_STATE, &state->flags);
482 }
483 if (open_stateid != NULL)
dc0b027d 484 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 485 write_sequnlock(&state->seqlock);
486 spin_lock(&state->owner->so_lock);
dc0b027d 487 update_open_stateflags(state, fmode);
ec073428 488 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 489}
490
dc0b027d 491static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 492{
493 struct nfs_inode *nfsi = NFS_I(state->inode);
494 struct nfs_delegation *deleg_cur;
495 int ret = 0;
496
dc0b027d 497 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 498
499 rcu_read_lock();
500 deleg_cur = rcu_dereference(nfsi->delegation);
501 if (deleg_cur == NULL)
502 goto no_delegation;
503
504 spin_lock(&deleg_cur->lock);
505 if (nfsi->delegation != deleg_cur ||
dc0b027d 506 (deleg_cur->type & fmode) != fmode)
34310430
TM		 507 goto no_delegation_unlock;
508
509 if (delegation == NULL)
510 delegation = &deleg_cur->stateid;
511 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
512 goto no_delegation_unlock;
513
b7391f44 514 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 515 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 516 ret = 1;
517no_delegation_unlock:
518 spin_unlock(&deleg_cur->lock);
519no_delegation:
520 rcu_read_unlock();
521
522 if (!ret && open_stateid != NULL) {
dc0b027d 523 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 524 ret = 1;
525 }
526
527 return ret;
528}
529
530
dc0b027d 531static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 532{
533 struct nfs_delegation *delegation;
534
535 rcu_read_lock();
536 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 537 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 538 rcu_read_unlock();
539 return;
540 }
541 rcu_read_unlock();
542 nfs_inode_return_delegation(inode);
543}
544
6ee41268 545static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 546{
547 struct nfs4_state *state = opendata->state;
548 struct nfs_inode *nfsi = NFS_I(state->inode);
549 struct nfs_delegation *delegation;
dc0b027d
TM		 550 int open_mode = opendata->o_arg.open_flags & O_EXCL;
551 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 552 nfs4_stateid stateid;
553 int ret = -EAGAIN;
554
aac00a8d 555 for (;;) {
dc0b027d 556 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 557 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 558 if (can_open_cached(state, fmode, open_mode)) {
559 update_open_stateflags(state, fmode);
6ee41268 560 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 561 goto out_return_state;
562 }
563 spin_unlock(&state->owner->so_lock);
564 }
34310430
TM		 565 rcu_read_lock();
566 delegation = rcu_dereference(nfsi->delegation);
567 if (delegation == NULL ||
dc0b027d 568 !can_open_delegated(delegation, fmode)) {
34310430 569 rcu_read_unlock();
aac00a8d 570 break;
34310430 571 }
aac00a8d
TM		 572 /* Save the delegation */
573 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
574 rcu_read_unlock();
af22f94a 575 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 576 if (ret != 0)
577 goto out;
578 ret = -EAGAIN;
34310430
TM		 579
580 /* Try to update the stateid using the delegation */
dc0b027d 581 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 582 goto out_return_state;
aac00a8d 583 }
aac00a8d
TM		 584out:
585 return ERR_PTR(ret);
586out_return_state:
587 atomic_inc(&state->count);
588 return state;
589}
590
24ac23ab
TM		 591static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
592{
593 struct inode *inode;
594 struct nfs4_state *state = NULL;
003707c7 595 struct nfs_delegation *delegation;
1b370bc2 596 int ret;
24ac23ab 597
aac00a8d 598 if (!data->rpc_done) {
6ee41268 599 state = nfs4_try_open_cached(data);
aac00a8d
TM		 600 goto out;
601 }
602
1b370bc2 603 ret = -EAGAIN;
24ac23ab 604 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 605 goto err;
24ac23ab 606 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 607 ret = PTR_ERR(inode);
03f28e3a 608 if (IS_ERR(inode))
1b370bc2
TM		 609 goto err;
610 ret = -ENOMEM;
24ac23ab
TM		 611 state = nfs4_get_open_state(inode, data->owner);
612 if (state == NULL)
1b370bc2 613 goto err_put_inode;
549d6ed5 614 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 615 int delegation_flags = 0;
616
003707c7
TM		 617 rcu_read_lock();
618 delegation = rcu_dereference(NFS_I(inode)->delegation);
619 if (delegation)
620 delegation_flags = delegation->flags;
621 rcu_read_unlock();
15c831bf 622 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 623 nfs_inode_set_delegation(state->inode,
624 data->owner->so_cred,
625 &data->o_res);
626 else
627 nfs_inode_reclaim_delegation(state->inode,
628 data->owner->so_cred,
629 &data->o_res);
630 }
34310430
TM		 631
632 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 633 data->o_arg.fmode);
24ac23ab 634 iput(inode);
aac00a8d 635out:
24ac23ab 636 return state;
1b370bc2
TM		 637err_put_inode:
638 iput(inode);
639err:
640 return ERR_PTR(ret);
24ac23ab
TM		 641}
642
864472e9
TM		 643static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
644{
645 struct nfs_inode *nfsi = NFS_I(state->inode);
646 struct nfs_open_context *ctx;
647
648 spin_lock(&state->inode->i_lock);
649 list_for_each_entry(ctx, &nfsi->open_files, list) {
650 if (ctx->state != state)
651 continue;
652 get_nfs_open_context(ctx);
653 spin_unlock(&state->inode->i_lock);
654 return ctx;
655 }
656 spin_unlock(&state->inode->i_lock);
657 return ERR_PTR(-ENOENT);
658}
659
6f220ed5
TM		 660static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
661{
662 struct nfs4_opendata *opendata;
663
dc0b027d 664 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 665 if (opendata == NULL)
666 return ERR_PTR(-ENOMEM);
667 opendata->state = state;
668 atomic_inc(&state->count);
669 return opendata;
670}
671
dc0b027d 672static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 673{
2ced46c2 674 struct nfs4_state *newstate;
864472e9
TM		 675 int ret;
676
dc0b027d
TM		 677 opendata->o_arg.open_flags = 0;
678 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 679 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
680 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
681 nfs4_init_opendata_res(opendata);
864472e9
TM		 682 ret = _nfs4_proc_open(opendata);
683 if (ret != 0)
684 return ret;
2ced46c2 685 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 686 if (IS_ERR(newstate))
687 return PTR_ERR(newstate);
dc0b027d 688 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 689 *res = newstate;
864472e9
TM		 690 return 0;
691}
692
693static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
694{
864472e9 695 struct nfs4_state *newstate;
864472e9
TM		 696 int ret;
697
698 /* memory barrier prior to reading state->n_* */
2ced46c2 699 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 700 smp_rmb();
701 if (state->n_rdwr != 0) {
2ced46c2 702 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 703 if (ret != 0)
704 return ret;
2ced46c2
TM		 705 if (newstate != state)
706 return -ESTALE;
864472e9
TM		 707 }
708 if (state->n_wronly != 0) {
2ced46c2 709 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 710 if (ret != 0)
711 return ret;
2ced46c2
TM		 712 if (newstate != state)
713 return -ESTALE;
864472e9
TM		 714 }
715 if (state->n_rdonly != 0) {
2ced46c2 716 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 717 if (ret != 0)
718 return ret;
2ced46c2
TM		 719 if (newstate != state)
720 return -ESTALE;
864472e9 721 }
1ac7e2fd
TM		 722 /*
723 * We may have performed cached opens for all three recoveries.
724 * Check if we need to update the current stateid.
725 */
726 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
727 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 728 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
730 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 731 write_sequnlock(&state->seqlock);
1ac7e2fd 732 }
864472e9
TM		 733 return 0;
734}
735
1da177e4
LT		 736/*
737 * OPEN_RECLAIM:
738 * reclaim state on the server after a reboot.
1da177e4 739 */
539cd03a 740static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 741{
1ac7e2fd 742 struct nfs_delegation *delegation;
864472e9 743 struct nfs4_opendata *opendata;
dc0b027d 744 fmode_t delegation_type = 0;
1da177e4
LT		 745 int status;
746
6f220ed5
TM		 747 opendata = nfs4_open_recoverdata_alloc(ctx, state);
748 if (IS_ERR(opendata))
749 return PTR_ERR(opendata);
864472e9
TM		 750 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
751 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 752 rcu_read_lock();
753 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 754 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 755 delegation_type = delegation->type;
1ac7e2fd 756 rcu_read_unlock();
864472e9
TM		 757 opendata->o_arg.u.delegation_type = delegation_type;
758 status = nfs4_open_recover(opendata, state);
c6d00e63 759 nfs4_opendata_put(opendata);
1da177e4
LT		 760 return status;
761}
762
539cd03a 763static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 764{
765 struct nfs_server *server = NFS_SERVER(state->inode);
766 struct nfs4_exception exception = { };
767 int err;
768 do {
539cd03a 769 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 770 if (err != -NFS4ERR_DELAY)
771 break;
772 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 773 } while (exception.retry);
774 return err;
775}
776
864472e9
TM		 777static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
778{
779 struct nfs_open_context *ctx;
780 int ret;
781
782 ctx = nfs4_state_find_open_context(state);
783 if (IS_ERR(ctx))
784 return PTR_ERR(ctx);
539cd03a 785 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 786 put_nfs_open_context(ctx);
787 return ret;
788}
789
13437e12 790static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 791{
e56e0b78 792 struct nfs4_opendata *opendata;
864472e9 793 int ret;
1da177e4 794
6f220ed5
TM		 795 opendata = nfs4_open_recoverdata_alloc(ctx, state);
796 if (IS_ERR(opendata))
797 return PTR_ERR(opendata);
e56e0b78 798 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 799 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 800 sizeof(opendata->o_arg.u.delegation.data));
864472e9 801 ret = nfs4_open_recover(opendata, state);
c6d00e63 802 nfs4_opendata_put(opendata);
864472e9 803 return ret;
1da177e4
LT		 804}
805
13437e12 806int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 807{
808 struct nfs4_exception exception = { };
539cd03a 809 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 810 int err;
811 do {
13437e12 812 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 813 switch (err) {
814 case 0:
815 return err;
816 case -NFS4ERR_STALE_CLIENTID:
817 case -NFS4ERR_STALE_STATEID:
818 case -NFS4ERR_EXPIRED:
819 /* Don't recall a delegation if it was lost */
7539bbab 820 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 821 return err;
822 }
823 err = nfs4_handle_exception(server, err, &exception);
824 } while (exception.retry);
825 return err;
826}
827
cdd4e68b
TM		 828static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
829{
830 struct nfs4_opendata *data = calldata;
831
832 data->rpc_status = task->tk_status;
833 if (RPC_ASSASSINATED(task))
834 return;
26e976a8 835 if (data->rpc_status == 0) {
cdd4e68b
TM		 836 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
837 sizeof(data->o_res.stateid.data));
bb22629e 838 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 839 renew_lease(data->o_res.server, data->timestamp);
3e309914 840 data->rpc_done = 1;
26e976a8 841 }
cdd4e68b
TM		 842}
843
844static void nfs4_open_confirm_release(void *calldata)
845{
846 struct nfs4_opendata *data = calldata;
847 struct nfs4_state *state = NULL;
848
849 /* If this request hasn't been cancelled, do nothing */
850 if (data->cancelled == 0)
851 goto out_free;
852 /* In case of error, no cleanup! */
3e309914 853 if (!data->rpc_done)
cdd4e68b 854 goto out_free;
cdd4e68b 855 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 856 if (!IS_ERR(state))
dc0b027d 857 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 858out_free:
c6d00e63 859 nfs4_opendata_put(data);
cdd4e68b
TM		 860}
861
862static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 863 .rpc_call_done = nfs4_open_confirm_done,
864 .rpc_release = nfs4_open_confirm_release,
865};
866
867/*
868 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
869 */
870static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
871{
872 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
873 struct rpc_task *task;
5138fde0
TM		 874 struct rpc_message msg = {
875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
876 .rpc_argp = &data->c_arg,
877 .rpc_resp = &data->c_res,
878 .rpc_cred = data->owner->so_cred,
879 };
c970aa85
TM		 880 struct rpc_task_setup task_setup_data = {
881 .rpc_client = server->client,
5138fde0 882 .rpc_message = &msg,
c970aa85
TM		 883 .callback_ops = &nfs4_open_confirm_ops,
884 .callback_data = data,
101070ca 885 .workqueue = nfsiod_workqueue,
c970aa85
TM		 886 .flags = RPC_TASK_ASYNC,
887 };
1da177e4
LT		 888 int status;
889
c6d00e63 890 kref_get(&data->kref);
3e309914
TM		 891 data->rpc_done = 0;
892 data->rpc_status = 0;
5138fde0 893 data->timestamp = jiffies;
c970aa85 894 task = rpc_run_task(&task_setup_data);
7a1218a2 895 if (IS_ERR(task))
cdd4e68b 896 return PTR_ERR(task);
cdd4e68b
TM		 897 status = nfs4_wait_for_completion_rpc_task(task);
898 if (status != 0) {
899 data->cancelled = 1;
900 smp_wmb();
901 } else
902 status = data->rpc_status;
e6b3c4db 903 rpc_put_task(task);
1da177e4
LT		 904 return status;
905}
906
24ac23ab 907static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 908{
24ac23ab
TM		 909 struct nfs4_opendata *data = calldata;
910 struct nfs4_state_owner *sp = data->owner;
5138fde0 911
24ac23ab
TM		 912 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
913 return;
aac00a8d
TM		 914 /*
915 * Check if we still need to send an OPEN call, or if we can use
916 * a delegation instead.
917 */
918 if (data->state != NULL) {
919 struct nfs_delegation *delegation;
920
dc0b027d 921 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 922 goto out_no_action;
aac00a8d
TM		 923 rcu_read_lock();
924 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
925 if (delegation != NULL &&
15c831bf 926 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 927 rcu_read_unlock();
6ee41268 928 goto out_no_action;
aac00a8d
TM		 929 }
930 rcu_read_unlock();
931 }
24ac23ab 932 /* Update sequence id. */
9f958ab8 933 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 934 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 935 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 936 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 937 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
938 }
26e976a8 939 data->timestamp = jiffies;
5138fde0 940 rpc_call_start(task);
6ee41268
TM		 941 return;
942out_no_action:
943 task->tk_action = NULL;
944
24ac23ab 945}
1da177e4 946
24ac23ab
TM		 947static void nfs4_open_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_opendata *data = calldata;
1da177e4 950
24ac23ab
TM		 951 data->rpc_status = task->tk_status;
952 if (RPC_ASSASSINATED(task))
953 return;
954 if (task->tk_status == 0) {
955 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 956 case S_IFREG:
957 break;
958 case S_IFLNK:
24ac23ab 959 data->rpc_status = -ELOOP;
6f926b5b
TM		 960 break;
961 case S_IFDIR:
24ac23ab 962 data->rpc_status = -EISDIR;
6f926b5b
TM		 963 break;
964 default:
24ac23ab 965 data->rpc_status = -ENOTDIR;
6f926b5b 966 }
26e976a8 967 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 968 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
969 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 970 }
3e309914 971 data->rpc_done = 1;
24ac23ab 972}
6f926b5b 973
24ac23ab
TM		 974static void nfs4_open_release(void *calldata)
975{
976 struct nfs4_opendata *data = calldata;
977 struct nfs4_state *state = NULL;
978
979 /* If this request hasn't been cancelled, do nothing */
980 if (data->cancelled == 0)
981 goto out_free;
982 /* In case of error, no cleanup! */
3e309914 983 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 984 goto out_free;
985 /* In case we need an open_confirm, no cleanup! */
986 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
987 goto out_free;
24ac23ab 988 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 989 if (!IS_ERR(state))
dc0b027d 990 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 991out_free:
c6d00e63 992 nfs4_opendata_put(data);
24ac23ab
TM		 993}
994
995static const struct rpc_call_ops nfs4_open_ops = {
996 .rpc_call_prepare = nfs4_open_prepare,
997 .rpc_call_done = nfs4_open_done,
998 .rpc_release = nfs4_open_release,
999};
1000
1001/*
1002 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1003 */
1004static int _nfs4_proc_open(struct nfs4_opendata *data)
1005{
1006 struct inode *dir = data->dir->d_inode;
1007 struct nfs_server *server = NFS_SERVER(dir);
1008 struct nfs_openargs *o_arg = &data->o_arg;
1009 struct nfs_openres *o_res = &data->o_res;
1010 struct rpc_task *task;
5138fde0
TM		 1011 struct rpc_message msg = {
1012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1013 .rpc_argp = o_arg,
1014 .rpc_resp = o_res,
1015 .rpc_cred = data->owner->so_cred,
1016 };
c970aa85
TM		 1017 struct rpc_task_setup task_setup_data = {
1018 .rpc_client = server->client,
5138fde0 1019 .rpc_message = &msg,
c970aa85
TM		 1020 .callback_ops = &nfs4_open_ops,
1021 .callback_data = data,
101070ca 1022 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1023 .flags = RPC_TASK_ASYNC,
1024 };
24ac23ab
TM		 1025 int status;
1026
c6d00e63 1027 kref_get(&data->kref);
3e309914
TM		 1028 data->rpc_done = 0;
1029 data->rpc_status = 0;
2ced46c2 1030 data->cancelled = 0;
c970aa85 1031 task = rpc_run_task(&task_setup_data);
7a1218a2 1032 if (IS_ERR(task))
24ac23ab 1033 return PTR_ERR(task);
24ac23ab
TM		 1034 status = nfs4_wait_for_completion_rpc_task(task);
1035 if (status != 0) {
1036 data->cancelled = 1;
1037 smp_wmb();
1038 } else
1039 status = data->rpc_status;
e6b3c4db 1040 rpc_put_task(task);
3e309914 1041 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1042 return status;
1043
9936781d
TM		 1044 if (o_res->fh.size == 0)
1045 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1046
56ae19f3
TM		 1047 if (o_arg->open_flags & O_CREAT) {
1048 update_changeattr(dir, &o_res->cinfo);
1049 nfs_post_op_update_inode(dir, o_res->dir_attr);
1050 } else
1051 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1052 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1053 status = _nfs4_proc_open_confirm(data);
1da177e4 1054 if (status != 0)
24ac23ab 1055 return status;
1da177e4
LT		 1056 }
1057 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1058 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1059 return 0;
1da177e4
LT		 1060}
1061
10afec90 1062static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1063{
7539bbab 1064 struct nfs_client *clp = server->nfs_client;
6b30954e 1065 int ret;
58d9714a 1066
6b30954e 1067 for (;;) {
65de872e 1068 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1069 if (ret != 0)
1070 return ret;
e598d843
TM		 1071 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1072 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1073 break;
58d9714a 1074 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1075 }
1076 return 0;
58d9714a
TM		 1077}
1078
1da177e4
LT		 1079/*
1080 * OPEN_EXPIRED:
1081 * reclaim state on the server after a network partition.
1082 * Assumes caller holds the appropriate lock
1083 */
539cd03a 1084static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1085{
e56e0b78 1086 struct nfs4_opendata *opendata;
864472e9 1087 int ret;
1da177e4 1088
6f220ed5
TM		 1089 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1090 if (IS_ERR(opendata))
1091 return PTR_ERR(opendata);
864472e9 1092 ret = nfs4_open_recover(opendata, state);
35d05778 1093 if (ret == -ESTALE)
539cd03a 1094 d_drop(ctx->path.dentry);
c6d00e63 1095 nfs4_opendata_put(opendata);
864472e9 1096 return ret;
1da177e4
LT		 1097}
1098
539cd03a 1099static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1100{
539cd03a 1101 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1102 struct nfs4_exception exception = { };
1103 int err;
1104
1105 do {
539cd03a 1106 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1107 if (err != -NFS4ERR_DELAY)
1108 break;
1109 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1110 } while (exception.retry);
1111 return err;
1112}
1113
1da177e4
LT		 1114static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1115{
1da177e4 1116 struct nfs_open_context *ctx;
864472e9 1117 int ret;
1da177e4 1118
864472e9
TM		 1119 ctx = nfs4_state_find_open_context(state);
1120 if (IS_ERR(ctx))
1121 return PTR_ERR(ctx);
539cd03a 1122 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1123 put_nfs_open_context(ctx);
1124 return ret;
1da177e4
LT		 1125}
1126
aa53ed54
JL		 1127/*
1128 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1129 * fields corresponding to attributes that were used to store the verifier.
1130 * Make sure we clobber those fields in the later setattr call
1131 */
1132static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1133{
1134 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1135 !(sattr->ia_valid & ATTR_ATIME_SET))
1136 sattr->ia_valid |= ATTR_ATIME;
1137
1138 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1139 !(sattr->ia_valid & ATTR_MTIME_SET))
1140 sattr->ia_valid |= ATTR_MTIME;
1141}
1142
1da177e4 1143/*
24ac23ab 1144 * Returns a referenced nfs4_state
1da177e4 1145 */
dc0b027d 1146static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1147{
1148 struct nfs4_state_owner *sp;
1149 struct nfs4_state *state = NULL;
1150 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1151 struct nfs4_opendata *opendata;
aac00a8d 1152 int status;
1da177e4
LT		 1153
1154 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1155 status = -ENOMEM;
1156 if (!(sp = nfs4_get_state_owner(server, cred))) {
1157 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1158 goto out_err;
1159 }
58d9714a
TM		 1160 status = nfs4_recover_expired_lease(server);
1161 if (status != 0)
b4454fe1 1162 goto err_put_state_owner;
aac00a8d 1163 if (path->dentry->d_inode != NULL)
dc0b027d 1164 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1165 status = -ENOMEM;
dc0b027d 1166 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1167 if (opendata == NULL)
95d35cb4 1168 goto err_put_state_owner;
1da177e4 1169
aac00a8d
TM		 1170 if (path->dentry->d_inode != NULL)
1171 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1172
24ac23ab 1173 status = _nfs4_proc_open(opendata);
1da177e4 1174 if (status != 0)
c6d00e63 1175 goto err_opendata_put;
1da177e4 1176
aa53ed54
JL		 1177 if (opendata->o_arg.open_flags & O_EXCL)
1178 nfs4_exclusive_attrset(opendata, sattr);
1179
24ac23ab 1180 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1181 status = PTR_ERR(state);
1182 if (IS_ERR(state))
c6d00e63 1183 goto err_opendata_put;
c6d00e63 1184 nfs4_opendata_put(opendata);
1da177e4 1185 nfs4_put_state_owner(sp);
1da177e4
LT		 1186 *res = state;
1187 return 0;
c6d00e63
TM		 1188err_opendata_put:
1189 nfs4_opendata_put(opendata);
e56e0b78
TM		 1190err_put_state_owner:
1191 nfs4_put_state_owner(sp);
1da177e4 1192out_err:
1da177e4
LT		 1193 *res = NULL;
1194 return status;
1195}
1196
1197
dc0b027d 1198static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1199{
1200 struct nfs4_exception exception = { };
1201 struct nfs4_state *res;
1202 int status;
1203
1204 do {
dc0b027d 1205 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1206 if (status == 0)
1207 break;
1208 /* NOTE: BAD_SEQID means the server and client disagree about the
1209 * book-keeping w.r.t. state-changing operations
1210 * (OPEN/CLOSE/LOCK/LOCKU...)
1211 * It is actually a sign of a bug on the client or on the server.
1212 *
1213 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1214 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1215 * have unhashed the old state_owner for us, and that we can
1216 * therefore safely retry using a new one. We should still warn
1217 * the user though...
1218 */
1219 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1220 printk(KERN_WARNING "NFS: v4 server %s "
1221 " returned a bad sequence-id error!\n",
1222 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1223 exception.retry = 1;
1224 continue;
1225 }
550f5747
TM		 1226 /*
1227 * BAD_STATEID on OPEN means that the server cancelled our
1228 * state before it received the OPEN_CONFIRM.
1229 * Recover by retrying the request as per the discussion
1230 * on Page 181 of RFC3530.
1231 */
1232 if (status == -NFS4ERR_BAD_STATEID) {
1233 exception.retry = 1;
1234 continue;
1235 }
aac00a8d
TM		 1236 if (status == -EAGAIN) {
1237 /* We must have found a delegation */
1238 exception.retry = 1;
1239 continue;
1240 }
1da177e4
LT		 1241 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1242 status, &exception));
1243 } while (exception.retry);
1244 return res;
1245}
1246
659bfcd6
TM		 1247static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1248 struct nfs_fattr *fattr, struct iattr *sattr,
1249 struct nfs4_state *state)
1da177e4 1250{
3e4f6290 1251 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1252 struct nfs_setattrargs arg = {
3e4f6290 1253 .fh = NFS_FH(inode),
1da177e4
LT		 1254 .iap = sattr,
1255 .server = server,
1256 .bitmask = server->attr_bitmask,
1257 };
1258 struct nfs_setattrres res = {
1259 .fattr = fattr,
1260 .server = server,
1261 };
1262 struct rpc_message msg = {
659bfcd6
TM		 1263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1264 .rpc_argp = &arg,
1265 .rpc_resp = &res,
1266 .rpc_cred = cred,
1da177e4 1267 };
26e976a8 1268 unsigned long timestamp = jiffies;
65e4308d 1269 int status;
1da177e4 1270
0e574af1 1271 nfs_fattr_init(fattr);
1da177e4 1272
3e4f6290
TM		 1273 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1274 /* Use that stateid */
1275 } else if (state != NULL) {
08e9eac4
TM		 1276 nfs4_copy_stateid(&arg.stateid, state, current->files);
1277 } else
1da177e4
LT		 1278 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1279
65e4308d 1280 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1281 if (status == 0 && state != NULL)
1282 renew_lease(server, timestamp);
65e4308d 1283 return status;
1da177e4
LT		 1284}
1285
659bfcd6
TM		 1286static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1287 struct nfs_fattr *fattr, struct iattr *sattr,
1288 struct nfs4_state *state)
1da177e4 1289{
3e4f6290 1290 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1291 struct nfs4_exception exception = { };
1292 int err;
1293 do {
1294 err = nfs4_handle_exception(server,
659bfcd6 1295 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1296 &exception);
1297 } while (exception.retry);
1298 return err;
1299}
1300
1301struct nfs4_closedata {
4a35bd41 1302 struct path path;
1da177e4
LT		 1303 struct inode *inode;
1304 struct nfs4_state *state;
1305 struct nfs_closeargs arg;
1306 struct nfs_closeres res;
516a6af6 1307 struct nfs_fattr fattr;
26e976a8 1308 unsigned long timestamp;
1da177e4
LT		 1309};
1310
963d8fe5 1311static void nfs4_free_closedata(void *data)
9512135d 1312{
963d8fe5
TM		 1313 struct nfs4_closedata *calldata = data;
1314 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1315
1316 nfs4_put_open_state(calldata->state);
1317 nfs_free_seqid(calldata->arg.seqid);
9512135d 1318 nfs4_put_state_owner(sp);
31f31db1 1319 path_put(&calldata->path);
9512135d
TM		 1320 kfree(calldata);
1321}
1322
963d8fe5 1323static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1324{
963d8fe5 1325 struct nfs4_closedata *calldata = data;
1da177e4 1326 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1327 struct nfs_server *server = NFS_SERVER(calldata->inode);
1328
4ce70ada
TM		 1329 if (RPC_ASSASSINATED(task))
1330 return;
1da177e4
LT		 1331 /* hmm. we are done with the inode, and in the process of freeing
1332 * the state_owner. we keep this around to process errors
1333 */
1da177e4
LT		 1334 switch (task->tk_status) {
1335 case 0:
45328c35 1336 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1337 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1338 break;
1339 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1340 case -NFS4ERR_OLD_STATEID:
1341 case -NFS4ERR_BAD_STATEID:
1da177e4 1342 case -NFS4ERR_EXPIRED:
dc0b027d 1343 if (calldata->arg.fmode == 0)
9e33bed5 1344 break;
1da177e4 1345 default:
9e33bed5 1346 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1347 rpc_restart_call(task);
1348 return;
1349 }
1350 }
516a6af6 1351 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1352}
1353
4ce70ada 1354static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1355{
4ce70ada 1356 struct nfs4_closedata *calldata = data;
9512135d 1357 struct nfs4_state *state = calldata->state;
003707c7 1358 int clear_rd, clear_wr, clear_rdwr;
9512135d 1359
963d8fe5 1360 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1361 return;
003707c7 1362
003707c7 1363 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1364 spin_lock(&state->owner->so_lock);
003707c7 1365 /* Calculate the change in open mode */
e7616923 1366 if (state->n_rdwr == 0) {
003707c7 1367 if (state->n_rdonly == 0) {
003707c7
TM		 1368 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1369 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1370 }
1371 if (state->n_wronly == 0) {
003707c7
TM		 1372 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1374 }
e7616923 1375 }
4cecb76f 1376 spin_unlock(&state->owner->so_lock);
003707c7 1377 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1378 /* Note: exit _without_ calling nfs4_close_done */
1379 task->tk_action = NULL;
9512135d
TM		 1380 return;
1381 }
516a6af6 1382 nfs_fattr_init(calldata->res.fattr);
45328c35 1383 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1384 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1385 calldata->arg.fmode = FMODE_READ;
45328c35 1386 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1387 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1388 calldata->arg.fmode = FMODE_WRITE;
45328c35 1389 }
26e976a8 1390 calldata->timestamp = jiffies;
5138fde0 1391 rpc_call_start(task);
1da177e4
LT		 1392}
1393
963d8fe5 1394static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1395 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1396 .rpc_call_done = nfs4_close_done,
1397 .rpc_release = nfs4_free_closedata,
1398};
1399
1da177e4
LT		 1400/*
1401 * It is possible for data to be read/written from a mem-mapped file
1402 * after the sys_close call (which hits the vfs layer as a flush).
1403 * This means that we can't safely call nfsv4 close on a file until
1404 * the inode is cleared. This in turn means that we are not good
1405 * NFSv4 citizens - we do not indicate to the server to update the file's
1406 * share state even when we are done with one of the three share
1407 * stateid's in the inode.
1408 *
1409 * NOTE: Caller must be holding the sp->so_owner semaphore!
1410 */
a49c3c77 1411int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1412{
4a35bd41 1413 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1414 struct nfs4_closedata *calldata;
b39e625b
TM		 1415 struct nfs4_state_owner *sp = state->owner;
1416 struct rpc_task *task;
5138fde0
TM		 1417 struct rpc_message msg = {
1418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1419 .rpc_cred = state->owner->so_cred,
1420 };
c970aa85
TM		 1421 struct rpc_task_setup task_setup_data = {
1422 .rpc_client = server->client,
5138fde0 1423 .rpc_message = &msg,
c970aa85 1424 .callback_ops = &nfs4_close_ops,
101070ca 1425 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1426 .flags = RPC_TASK_ASYNC,
1427 };
9512135d 1428 int status = -ENOMEM;
1da177e4 1429
9512135d 1430 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1431 if (calldata == NULL)
9512135d 1432 goto out;
4a35bd41 1433 calldata->inode = state->inode;
1da177e4 1434 calldata->state = state;
4a35bd41 1435 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1436 calldata->arg.stateid = &state->open_stateid;
1da177e4 1437 /* Serialization for the sequence id */
cee54fc9 1438 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1439 if (calldata->arg.seqid == NULL)
1440 goto out_free_calldata;
dc0b027d 1441 calldata->arg.fmode = 0;
516a6af6
TM		 1442 calldata->arg.bitmask = server->attr_bitmask;
1443 calldata->res.fattr = &calldata->fattr;
c1d51931 1444 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1445 calldata->res.server = server;
4a35bd41
TM		 1446 calldata->path.mnt = mntget(path->mnt);
1447 calldata->path.dentry = dget(path->dentry);
9512135d 1448
5138fde0
TM		 1449 msg.rpc_argp = &calldata->arg,
1450 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1451 task_setup_data.callback_data = calldata;
1452 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1453 if (IS_ERR(task))
1454 return PTR_ERR(task);
a49c3c77
TM		 1455 status = 0;
1456 if (wait)
1457 status = rpc_wait_for_completion_task(task);
b39e625b 1458 rpc_put_task(task);
a49c3c77 1459 return status;
9512135d
TM		 1460out_free_calldata:
1461 kfree(calldata);
1462out:
b39e625b
TM		 1463 nfs4_put_open_state(state);
1464 nfs4_put_state_owner(sp);
9512135d 1465 return status;
1da177e4
LT		 1466}
1467
dc0b027d 1468static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1469{
1470 struct file *filp;
1b45c46c 1471 int ret;
02a913a7 1472
1b45c46c 1473 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1474 if (fmode & FMODE_EXEC) {
af22f94a 1475 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1476 state->owner->so_cred,
1477 nd->intent.open.flags);
1478 if (ret < 0)
1479 goto out_close;
1480 }
4a35bd41 1481 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1482 if (!IS_ERR(filp)) {
1483 struct nfs_open_context *ctx;
cd3758e3 1484 ctx = nfs_file_open_context(filp);
02a913a7 1485 ctx->state = state;
95cf959b
TM		 1486 return 0;
1487 }
1b45c46c
TM		 1488 ret = PTR_ERR(filp);
1489out_close:
dc0b027d 1490 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1491 return ret;
02a913a7
TM		 1492}
1493
1494struct dentry *
1da177e4
LT		 1495nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1496{
ad389da7 1497 struct path path = {
4ac91378 1498 .mnt = nd->path.mnt,
ad389da7
TM		 1499 .dentry = dentry,
1500 };
4ac91378 1501 struct dentry *parent;
1da177e4
LT		 1502 struct iattr attr;
1503 struct rpc_cred *cred;
1504 struct nfs4_state *state;
02a913a7 1505 struct dentry *res;
dc0b027d 1506 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1507
1508 if (nd->flags & LOOKUP_CREATE) {
1509 attr.ia_mode = nd->intent.open.create_mode;
1510 attr.ia_valid = ATTR_MODE;
1511 if (!IS_POSIXACL(dir))
1512 attr.ia_mode &= ~current->fs->umask;
1513 } else {
1514 attr.ia_valid = 0;
1515 BUG_ON(nd->intent.open.flags & O_CREAT);
1516 }
1517
98a8e323 1518 cred = rpc_lookup_cred();
1da177e4 1519 if (IS_ERR(cred))
02a913a7 1520 return (struct dentry *)cred;
565277f6
TM		 1521 parent = dentry->d_parent;
1522 /* Protect against concurrent sillydeletes */
1523 nfs_block_sillyrename(parent);
dc0b027d 1524 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1525 put_rpccred(cred);
02a913a7 1526 if (IS_ERR(state)) {
d75340cc 1527 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1528 d_add(dentry, NULL);
d75340cc
TM		 1529 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1530 }
565277f6 1531 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1532 return (struct dentry *)state;
1533 }
24ac23ab 1534 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1535 if (res != NULL)
deee9369 1536 path.dentry = res;
d75340cc 1537 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1538 nfs_unblock_sillyrename(parent);
dc0b027d 1539 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1540 return res;
1da177e4
LT		 1541}
1542
1543int
02a913a7 1544nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1545{
ad389da7 1546 struct path path = {
4ac91378 1547 .mnt = nd->path.mnt,
ad389da7
TM		 1548 .dentry = dentry,
1549 };
1da177e4
LT		 1550 struct rpc_cred *cred;
1551 struct nfs4_state *state;
dc0b027d 1552 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1553
98a8e323 1554 cred = rpc_lookup_cred();
1da177e4
LT		 1555 if (IS_ERR(cred))
1556 return PTR_ERR(cred);
dc0b027d 1557 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1558 put_rpccred(cred);
02a913a7
TM		 1559 if (IS_ERR(state)) {
1560 switch (PTR_ERR(state)) {
1561 case -EPERM:
1562 case -EACCES:
1563 case -EDQUOT:
1564 case -ENOSPC:
1565 case -EROFS:
1566 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1567 return 1;
b87c0adf
CL		 1568 default:
1569 goto out_drop;
02a913a7 1570 }
02a913a7 1571 }
24ac23ab 1572 if (state->inode == dentry->d_inode) {
d75340cc 1573 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1574 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1575 return 1;
1576 }
dc0b027d 1577 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1578out_drop:
1579 d_drop(dentry);
1da177e4
LT		 1580 return 0;
1581}
1582
1583
1584static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1585{
1586 struct nfs4_server_caps_res res = {};
1587 struct rpc_message msg = {
1588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1589 .rpc_argp = fhandle,
1590 .rpc_resp = &res,
1591 };
1592 int status;
1593
1594 status = rpc_call_sync(server->client, &msg, 0);
1595 if (status == 0) {
1596 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1597 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1598 server->caps |= NFS_CAP_ACLS;
1599 if (res.has_links != 0)
1600 server->caps |= NFS_CAP_HARDLINKS;
1601 if (res.has_symlinks != 0)
1602 server->caps |= NFS_CAP_SYMLINKS;
1603 server->acl_bitmask = res.acl_bitmask;
1604 }
1605 return status;
1606}
1607
55a97593 1608int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1609{
1610 struct nfs4_exception exception = { };
1611 int err;
1612 do {
1613 err = nfs4_handle_exception(server,
1614 _nfs4_server_capabilities(server, fhandle),
1615 &exception);
1616 } while (exception.retry);
1617 return err;
1618}
1619
1620static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1621 struct nfs_fsinfo *info)
1622{
1da177e4
LT		 1623 struct nfs4_lookup_root_arg args = {
1624 .bitmask = nfs4_fattr_bitmap,
1625 };
1626 struct nfs4_lookup_res res = {
1627 .server = server,
0e574af1 1628 .fattr = info->fattr,
1da177e4
LT		 1629 .fh = fhandle,
1630 };
1631 struct rpc_message msg = {
1632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1633 .rpc_argp = &args,
1634 .rpc_resp = &res,
1635 };
0e574af1 1636 nfs_fattr_init(info->fattr);
1da177e4
LT		 1637 return rpc_call_sync(server->client, &msg, 0);
1638}
1639
1640static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1641 struct nfs_fsinfo *info)
1642{
1643 struct nfs4_exception exception = { };
1644 int err;
1645 do {
1646 err = nfs4_handle_exception(server,
1647 _nfs4_lookup_root(server, fhandle, info),
1648 &exception);
1649 } while (exception.retry);
1650 return err;
1651}
1652
54ceac45
DH		 1653/*
1654 * get the file handle for the "/" directory on the server
1655 */
1da177e4 1656static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1657 struct nfs_fsinfo *info)
1da177e4 1658{
1da177e4
LT		 1659 int status;
1660
1da177e4 1661 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1662 if (status == 0)
1663 status = nfs4_server_capabilities(server, fhandle);
1664 if (status == 0)
1665 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1666 return nfs4_map_errors(status);
1da177e4
LT		 1667}
1668
6b97fd3d
MN		 1669/*
1670 * Get locations and (maybe) other attributes of a referral.
1671 * Note that we'll actually follow the referral later when
1672 * we detect fsid mismatch in inode revalidation
1673 */
56659e99 1674static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1675{
1676 int status = -ENOMEM;
1677 struct page *page = NULL;
1678 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1679
1680 page = alloc_page(GFP_KERNEL);
1681 if (page == NULL)
1682 goto out;
1683 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1684 if (locations == NULL)
1685 goto out;
1686
c228fd3a 1687 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1688 if (status != 0)
1689 goto out;
1690 /* Make sure server returned a different fsid for the referral */
1691 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1692 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1693 status = -EIO;
1694 goto out;
1695 }
1696
1697 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1698 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1699 if (!fattr->mode)
1700 fattr->mode = S_IFDIR;
1701 memset(fhandle, 0, sizeof(struct nfs_fh));
1702out:
1703 if (page)
1704 __free_page(page);
1705 if (locations)
1706 kfree(locations);
1707 return status;
1708}
1709
1da177e4
LT		 1710static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1711{
1712 struct nfs4_getattr_arg args = {
1713 .fh = fhandle,
1714 .bitmask = server->attr_bitmask,
1715 };
1716 struct nfs4_getattr_res res = {
1717 .fattr = fattr,
1718 .server = server,
1719 };
1720 struct rpc_message msg = {
1721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1722 .rpc_argp = &args,
1723 .rpc_resp = &res,
1724 };
1725
0e574af1 1726 nfs_fattr_init(fattr);
1da177e4
LT		 1727 return rpc_call_sync(server->client, &msg, 0);
1728}
1729
1730static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1731{
1732 struct nfs4_exception exception = { };
1733 int err;
1734 do {
1735 err = nfs4_handle_exception(server,
1736 _nfs4_proc_getattr(server, fhandle, fattr),
1737 &exception);
1738 } while (exception.retry);
1739 return err;
1740}
1741
1742/*
1743 * The file is not closed if it is opened due to the a request to change
1744 * the size of the file. The open call will not be needed once the
1745 * VFS layer lookup-intents are implemented.
1746 *
1747 * Close is called when the inode is destroyed.
1748 * If we haven't opened the file for O_WRONLY, we
1749 * need to in the size_change case to obtain a stateid.
1750 *
1751 * Got race?
1752 * Because OPEN is always done by name in nfsv4, it is
1753 * possible that we opened a different file by the same
1754 * name. We can recognize this race condition, but we
1755 * can't do anything about it besides returning an error.
1756 *
1757 * This will be fixed with VFS changes (lookup-intent).
1758 */
1759static int
1760nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1761 struct iattr *sattr)
1762{
08e9eac4 1763 struct inode *inode = dentry->d_inode;
659bfcd6 1764 struct rpc_cred *cred = NULL;
d530838b 1765 struct nfs4_state *state = NULL;
1da177e4
LT		 1766 int status;
1767
0e574af1 1768 nfs_fattr_init(fattr);
1da177e4 1769
d530838b 1770 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1771 if (sattr->ia_valid & ATTR_FILE) {
1772 struct nfs_open_context *ctx;
1773
1774 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1775 if (ctx) {
1776 cred = ctx->cred;
1777 state = ctx->state;
1778 }
659bfcd6 1779 }
08e9eac4 1780
659bfcd6 1781 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1782 if (status == 0)
1783 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1784 return status;
1785}
1786
56659e99
TM		 1787static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1788 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1789 struct nfs_fattr *fattr)
1790{
1791 int status;
1792 struct nfs4_lookup_arg args = {
1793 .bitmask = server->attr_bitmask,
1794 .dir_fh = dirfh,
1795 .name = name,
1796 };
1797 struct nfs4_lookup_res res = {
1798 .server = server,
1799 .fattr = fattr,
1800 .fh = fhandle,
1801 };
1802 struct rpc_message msg = {
1803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1804 .rpc_argp = &args,
1805 .rpc_resp = &res,
1806 };
1807
1808 nfs_fattr_init(fattr);
1809
1810 dprintk("NFS call lookupfh %s\n", name->name);
1811 status = rpc_call_sync(server->client, &msg, 0);
1812 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1813 return status;
1814}
1815
1816static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1817 struct qstr *name, struct nfs_fh *fhandle,
1818 struct nfs_fattr *fattr)
1819{
1820 struct nfs4_exception exception = { };
1821 int err;
1822 do {
4e56e082
TM		 1823 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1824 /* FIXME: !!!! */
1825 if (err == -NFS4ERR_MOVED) {
1826 err = -EREMOTE;
1827 break;
1828 }
1829 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1830 } while (exception.retry);
1831 return err;
1832}
1833
56659e99 1834static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1835 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1836{
4e56e082 1837 int status;
1da177e4
LT		 1838
1839 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1840 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1841 if (status == -NFS4ERR_MOVED)
1842 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1843 dprintk("NFS reply lookup: %d\n", status);
1844 return status;
1845}
1846
1847static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1848{
1849 struct nfs4_exception exception = { };
1850 int err;
1851 do {
1852 err = nfs4_handle_exception(NFS_SERVER(dir),
1853 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1854 &exception);
1855 } while (exception.retry);
1856 return err;
1857}
1858
1859static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1860{
76b32999
TM		 1861 struct nfs_server *server = NFS_SERVER(inode);
1862 struct nfs_fattr fattr;
1da177e4
LT		 1863 struct nfs4_accessargs args = {
1864 .fh = NFS_FH(inode),
76b32999
TM		 1865 .bitmask = server->attr_bitmask,
1866 };
1867 struct nfs4_accessres res = {
1868 .server = server,
1869 .fattr = &fattr,
1da177e4 1870 };
1da177e4
LT		 1871 struct rpc_message msg = {
1872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1873 .rpc_argp = &args,
1874 .rpc_resp = &res,
1875 .rpc_cred = entry->cred,
1876 };
1877 int mode = entry->mask;
1878 int status;
1879
1880 /*
1881 * Determine which access bits we want to ask for...
1882 */
1883 if (mode & MAY_READ)
1884 args.access |= NFS4_ACCESS_READ;
1885 if (S_ISDIR(inode->i_mode)) {
1886 if (mode & MAY_WRITE)
1887 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1888 if (mode & MAY_EXEC)
1889 args.access |= NFS4_ACCESS_LOOKUP;
1890 } else {
1891 if (mode & MAY_WRITE)
1892 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1893 if (mode & MAY_EXEC)
1894 args.access |= NFS4_ACCESS_EXECUTE;
1895 }
76b32999 1896 nfs_fattr_init(&fattr);
1da177e4
LT		 1897 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1898 if (!status) {
1899 entry->mask = 0;
1900 if (res.access & NFS4_ACCESS_READ)
1901 entry->mask |= MAY_READ;
1902 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1903 entry->mask |= MAY_WRITE;
1904 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1905 entry->mask |= MAY_EXEC;
76b32999 1906 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1907 }
1908 return status;
1909}
1910
1911static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1912{
1913 struct nfs4_exception exception = { };
1914 int err;
1915 do {
1916 err = nfs4_handle_exception(NFS_SERVER(inode),
1917 _nfs4_proc_access(inode, entry),
1918 &exception);
1919 } while (exception.retry);
1920 return err;
1921}
1922
1923/*
1924 * TODO: For the time being, we don't try to get any attributes
1925 * along with any of the zero-copy operations READ, READDIR,
1926 * READLINK, WRITE.
1927 *
1928 * In the case of the first three, we want to put the GETATTR
1929 * after the read-type operation -- this is because it is hard
1930 * to predict the length of a GETATTR response in v4, and thus
1931 * align the READ data correctly. This means that the GETATTR
1932 * may end up partially falling into the page cache, and we should
1933 * shift it into the 'tail' of the xdr_buf before processing.
1934 * To do this efficiently, we need to know the total length
1935 * of data received, which doesn't seem to be available outside
1936 * of the RPC layer.
1937 *
1938 * In the case of WRITE, we also want to put the GETATTR after
1939 * the operation -- in this case because we want to make sure
1940 * we get the post-operation mtime and size. This means that
1941 * we can't use xdr_encode_pages() as written: we need a variant
1942 * of it which would leave room in the 'tail' iovec.
1943 *
1944 * Both of these changes to the XDR layer would in fact be quite
1945 * minor, but I decided to leave them for a subsequent patch.
1946 */
1947static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1948 unsigned int pgbase, unsigned int pglen)
1949{
1950 struct nfs4_readlink args = {
1951 .fh = NFS_FH(inode),
1952 .pgbase = pgbase,
1953 .pglen = pglen,
1954 .pages = &page,
1955 };
1956 struct rpc_message msg = {
1957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1958 .rpc_argp = &args,
1959 .rpc_resp = NULL,
1960 };
1961
1962 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1963}
1964
1965static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1966 unsigned int pgbase, unsigned int pglen)
1967{
1968 struct nfs4_exception exception = { };
1969 int err;
1970 do {
1971 err = nfs4_handle_exception(NFS_SERVER(inode),
1972 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1973 &exception);
1974 } while (exception.retry);
1975 return err;
1976}
1977
1da177e4
LT		 1978/*
1979 * Got race?
1980 * We will need to arrange for the VFS layer to provide an atomic open.
1981 * Until then, this create/open method is prone to inefficiency and race
1982 * conditions due to the lookup, create, and open VFS calls from sys_open()
1983 * placed on the wire.
1984 *
1985 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1986 * The file will be opened again in the subsequent VFS open call
1987 * (nfs4_proc_file_open).
1988 *
1989 * The open for read will just hang around to be used by any process that
1990 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1991 */
1992
1993static int
1994nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1995 int flags, struct nameidata *nd)
1da177e4 1996{
ad389da7 1997 struct path path = {
4ac91378 1998 .mnt = nd->path.mnt,
ad389da7
TM		 1999 .dentry = dentry,
2000 };
1da177e4
LT		 2001 struct nfs4_state *state;
2002 struct rpc_cred *cred;
dc0b027d 2003 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2004 int status = 0;
2005
98a8e323 2006 cred = rpc_lookup_cred();
1da177e4
LT		 2007 if (IS_ERR(cred)) {
2008 status = PTR_ERR(cred);
2009 goto out;
2010 }
dc0b027d 2011 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2012 d_drop(dentry);
1da177e4
LT		 2013 if (IS_ERR(state)) {
2014 status = PTR_ERR(state);
659bfcd6 2015 goto out_putcred;
1da177e4 2016 }
d4d9cdcb 2017 d_add(dentry, igrab(state->inode));
d75340cc 2018 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2019 if (flags & O_EXCL) {
2020 struct nfs_fattr fattr;
659bfcd6 2021 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2022 if (status == 0)
65e4308d 2023 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2024 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2025 }
ad389da7 2026 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2027 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2028 else
dc0b027d 2029 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2030out_putcred:
2031 put_rpccred(cred);
1da177e4
LT		 2032out:
2033 return status;
2034}
2035
2036static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2037{
16e42959 2038 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2039 struct nfs_removeargs args = {
1da177e4 2040 .fh = NFS_FH(dir),
4fdc17b2
TM		 2041 .name.len = name->len,
2042 .name.name = name->name,
16e42959
TM		 2043 .bitmask = server->attr_bitmask,
2044 };
4fdc17b2 2045 struct nfs_removeres res = {
16e42959 2046 .server = server,
1da177e4 2047 };
1da177e4 2048 struct rpc_message msg = {
4fdc17b2
TM		 2049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2050 .rpc_argp = &args,
2051 .rpc_resp = &res,
1da177e4
LT		 2052 };
2053 int status;
2054
4fdc17b2 2055 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 2056 status = rpc_call_sync(server->client, &msg, 0);
2057 if (status == 0) {
2058 update_changeattr(dir, &res.cinfo);
4fdc17b2 2059 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2060 }
1da177e4
LT		 2061 return status;
2062}
2063
2064static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2065{
2066 struct nfs4_exception exception = { };
2067 int err;
2068 do {
2069 err = nfs4_handle_exception(NFS_SERVER(dir),
2070 _nfs4_proc_remove(dir, name),
2071 &exception);
2072 } while (exception.retry);
2073 return err;
2074}
2075
e4eff1a6 2076static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2077{
e4eff1a6
TM		 2078 struct nfs_server *server = NFS_SERVER(dir);
2079 struct nfs_removeargs *args = msg->rpc_argp;
2080 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2081
e4eff1a6
TM		 2082 args->bitmask = server->attr_bitmask;
2083 res->server = server;
1da177e4 2084 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2085}
2086
e4eff1a6 2087static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2088{
e4eff1a6
TM		 2089 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2090
9e33bed5 2091 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2092 return 0;
2093 update_changeattr(dir, &res->cinfo);
2094 nfs_post_op_update_inode(dir, &res->dir_attr);
2095 return 1;
1da177e4
LT		 2096}
2097
2098static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2099 struct inode *new_dir, struct qstr *new_name)
2100{
6caf2c82 2101 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2102 struct nfs4_rename_arg arg = {
2103 .old_dir = NFS_FH(old_dir),
2104 .new_dir = NFS_FH(new_dir),
2105 .old_name = old_name,
2106 .new_name = new_name,
6caf2c82
TM		 2107 .bitmask = server->attr_bitmask,
2108 };
2109 struct nfs_fattr old_fattr, new_fattr;
2110 struct nfs4_rename_res res = {
2111 .server = server,
2112 .old_fattr = &old_fattr,
2113 .new_fattr = &new_fattr,
1da177e4 2114 };
1da177e4
LT		 2115 struct rpc_message msg = {
2116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2117 .rpc_argp = &arg,
2118 .rpc_resp = &res,
2119 };
2120 int status;
2121
6caf2c82
TM		 2122 nfs_fattr_init(res.old_fattr);
2123 nfs_fattr_init(res.new_fattr);
2124 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2125
2126 if (!status) {
2127 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2128 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2129 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2130 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2131 }
2132 return status;
2133}
2134
2135static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2136 struct inode *new_dir, struct qstr *new_name)
2137{
2138 struct nfs4_exception exception = { };
2139 int err;
2140 do {
2141 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2142 _nfs4_proc_rename(old_dir, old_name,
2143 new_dir, new_name),
2144 &exception);
2145 } while (exception.retry);
2146 return err;
2147}
2148
2149static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2150{
91ba2eee 2151 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2152 struct nfs4_link_arg arg = {
2153 .fh = NFS_FH(inode),
2154 .dir_fh = NFS_FH(dir),
2155 .name = name,
91ba2eee
TM		 2156 .bitmask = server->attr_bitmask,
2157 };
2158 struct nfs_fattr fattr, dir_attr;
2159 struct nfs4_link_res res = {
2160 .server = server,
2161 .fattr = &fattr,
2162 .dir_attr = &dir_attr,
1da177e4 2163 };
1da177e4
LT		 2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2166 .rpc_argp = &arg,
91ba2eee 2167 .rpc_resp = &res,
1da177e4
LT		 2168 };
2169 int status;
2170
91ba2eee
TM		 2171 nfs_fattr_init(res.fattr);
2172 nfs_fattr_init(res.dir_attr);
2173 status = rpc_call_sync(server->client, &msg, 0);
2174 if (!status) {
2175 update_changeattr(dir, &res.cinfo);
2176 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2177 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2178 }
1da177e4
LT		 2179
2180 return status;
2181}
2182
2183static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2184{
2185 struct nfs4_exception exception = { };
2186 int err;
2187 do {
2188 err = nfs4_handle_exception(NFS_SERVER(inode),
2189 _nfs4_proc_link(inode, dir, name),
2190 &exception);
2191 } while (exception.retry);
2192 return err;
2193}
2194
57dc9a57
TM		 2195struct nfs4_createdata {
2196 struct rpc_message msg;
2197 struct nfs4_create_arg arg;
2198 struct nfs4_create_res res;
2199 struct nfs_fh fh;
2200 struct nfs_fattr fattr;
2201 struct nfs_fattr dir_fattr;
2202};
2203
2204static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2205 struct qstr *name, struct iattr *sattr, u32 ftype)
2206{
2207 struct nfs4_createdata *data;
2208
2209 data = kzalloc(sizeof(*data), GFP_KERNEL);
2210 if (data != NULL) {
2211 struct nfs_server *server = NFS_SERVER(dir);
2212
2213 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2214 data->msg.rpc_argp = &data->arg;
2215 data->msg.rpc_resp = &data->res;
2216 data->arg.dir_fh = NFS_FH(dir);
2217 data->arg.server = server;
2218 data->arg.name = name;
2219 data->arg.attrs = sattr;
2220 data->arg.ftype = ftype;
2221 data->arg.bitmask = server->attr_bitmask;
2222 data->res.server = server;
2223 data->res.fh = &data->fh;
2224 data->res.fattr = &data->fattr;
2225 data->res.dir_fattr = &data->dir_fattr;
2226 nfs_fattr_init(data->res.fattr);
2227 nfs_fattr_init(data->res.dir_fattr);
2228 }
2229 return data;
2230}
2231
2232static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2233{
2234 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2235 if (status == 0) {
2236 update_changeattr(dir, &data->res.dir_cinfo);
2237 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2238 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2239 }
2240 return status;
2241}
2242
2243static void nfs4_free_createdata(struct nfs4_createdata *data)
2244{
2245 kfree(data);
2246}
2247
4f390c15 2248static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2249 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2250{
57dc9a57
TM		 2251 struct nfs4_createdata *data;
2252 int status = -ENAMETOOLONG;
1da177e4 2253
94a6d753 2254 if (len > NFS4_MAXPATHLEN)
57dc9a57 2255 goto out;
4f390c15 2256
57dc9a57
TM		 2257 status = -ENOMEM;
2258 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2259 if (data == NULL)
2260 goto out;
2261
2262 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2263 data->arg.u.symlink.pages = &page;
2264 data->arg.u.symlink.len = len;
1da177e4 2265
57dc9a57
TM		 2266 status = nfs4_do_create(dir, dentry, data);
2267
2268 nfs4_free_createdata(data);
2269out:
1da177e4
LT		 2270 return status;
2271}
2272
4f390c15 2273static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2274 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2275{
2276 struct nfs4_exception exception = { };
2277 int err;
2278 do {
2279 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2280 _nfs4_proc_symlink(dir, dentry, page,
2281 len, sattr),
1da177e4
LT		 2282 &exception);
2283 } while (exception.retry);
2284 return err;
2285}
2286
2287static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2288 struct iattr *sattr)
2289{
57dc9a57
TM		 2290 struct nfs4_createdata *data;
2291 int status = -ENOMEM;
1da177e4 2292
57dc9a57
TM		 2293 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2294 if (data == NULL)
2295 goto out;
2296
2297 status = nfs4_do_create(dir, dentry, data);
2298
2299 nfs4_free_createdata(data);
2300out:
1da177e4
LT		 2301 return status;
2302}
2303
2304static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2305 struct iattr *sattr)
2306{
2307 struct nfs4_exception exception = { };
2308 int err;
2309 do {
2310 err = nfs4_handle_exception(NFS_SERVER(dir),
2311 _nfs4_proc_mkdir(dir, dentry, sattr),
2312 &exception);
2313 } while (exception.retry);
2314 return err;
2315}
2316
2317static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2318 u64 cookie, struct page *page, unsigned int count, int plus)
2319{
2320 struct inode *dir = dentry->d_inode;
2321 struct nfs4_readdir_arg args = {
2322 .fh = NFS_FH(dir),
2323 .pages = &page,
2324 .pgbase = 0,
2325 .count = count,
2326 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2327 };
2328 struct nfs4_readdir_res res;
2329 struct rpc_message msg = {
2330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2331 .rpc_argp = &args,
2332 .rpc_resp = &res,
2333 .rpc_cred = cred,
2334 };
2335 int status;
2336
3110ff80 2337 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2338 dentry->d_parent->d_name.name,
2339 dentry->d_name.name,
2340 (unsigned long long)cookie);
1da177e4
LT		 2341 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2342 res.pgbase = args.pgbase;
2343 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2344 if (status == 0)
2345 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2346
2347 nfs_invalidate_atime(dir);
2348
3110ff80 2349 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2350 return status;
2351}
2352
2353static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2354 u64 cookie, struct page *page, unsigned int count, int plus)
2355{
2356 struct nfs4_exception exception = { };
2357 int err;
2358 do {
2359 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2360 _nfs4_proc_readdir(dentry, cred, cookie,
2361 page, count, plus),
2362 &exception);
2363 } while (exception.retry);
2364 return err;
2365}
2366
2367static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2368 struct iattr *sattr, dev_t rdev)
2369{
57dc9a57
TM		 2370 struct nfs4_createdata *data;
2371 int mode = sattr->ia_mode;
2372 int status = -ENOMEM;
1da177e4
LT		 2373
2374 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2375 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2376
2377 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2378 if (data == NULL)
2379 goto out;
2380
1da177e4 2381 if (S_ISFIFO(mode))
57dc9a57 2382 data->arg.ftype = NF4FIFO;
1da177e4 2383 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2384 data->arg.ftype = NF4BLK;
2385 data->arg.u.device.specdata1 = MAJOR(rdev);
2386 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2387 }
2388 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2389 data->arg.ftype = NF4CHR;
2390 data->arg.u.device.specdata1 = MAJOR(rdev);
2391 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2392 }
1da177e4 2393
57dc9a57
TM		 2394 status = nfs4_do_create(dir, dentry, data);
2395
2396 nfs4_free_createdata(data);
2397out:
1da177e4
LT		 2398 return status;
2399}
2400
2401static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2402 struct iattr *sattr, dev_t rdev)
2403{
2404 struct nfs4_exception exception = { };
2405 int err;
2406 do {
2407 err = nfs4_handle_exception(NFS_SERVER(dir),
2408 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2409 &exception);
2410 } while (exception.retry);
2411 return err;
2412}
2413
2414static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2415 struct nfs_fsstat *fsstat)
2416{
2417 struct nfs4_statfs_arg args = {
2418 .fh = fhandle,
2419 .bitmask = server->attr_bitmask,
2420 };
2421 struct rpc_message msg = {
2422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2423 .rpc_argp = &args,
2424 .rpc_resp = fsstat,
2425 };
2426
0e574af1 2427 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2428 return rpc_call_sync(server->client, &msg, 0);
2429}
2430
2431static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2432{
2433 struct nfs4_exception exception = { };
2434 int err;
2435 do {
2436 err = nfs4_handle_exception(server,
2437 _nfs4_proc_statfs(server, fhandle, fsstat),
2438 &exception);
2439 } while (exception.retry);
2440 return err;
2441}
2442
2443static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2444 struct nfs_fsinfo *fsinfo)
2445{
2446 struct nfs4_fsinfo_arg args = {
2447 .fh = fhandle,
2448 .bitmask = server->attr_bitmask,
2449 };
2450 struct rpc_message msg = {
2451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2452 .rpc_argp = &args,
2453 .rpc_resp = fsinfo,
2454 };
2455
2456 return rpc_call_sync(server->client, &msg, 0);
2457}
2458
2459static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2460{
2461 struct nfs4_exception exception = { };
2462 int err;
2463
2464 do {
2465 err = nfs4_handle_exception(server,
2466 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2467 &exception);
2468 } while (exception.retry);
2469 return err;
2470}
2471
2472static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2473{
0e574af1 2474 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2475 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2476}
2477
2478static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2479 struct nfs_pathconf *pathconf)
2480{
2481 struct nfs4_pathconf_arg args = {
2482 .fh = fhandle,
2483 .bitmask = server->attr_bitmask,
2484 };
2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2487 .rpc_argp = &args,
2488 .rpc_resp = pathconf,
2489 };
2490
2491 /* None of the pathconf attributes are mandatory to implement */
2492 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2493 memset(pathconf, 0, sizeof(*pathconf));
2494 return 0;
2495 }
2496
0e574af1 2497 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2498 return rpc_call_sync(server->client, &msg, 0);
2499}
2500
2501static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2502 struct nfs_pathconf *pathconf)
2503{
2504 struct nfs4_exception exception = { };
2505 int err;
2506
2507 do {
2508 err = nfs4_handle_exception(server,
2509 _nfs4_proc_pathconf(server, fhandle, pathconf),
2510 &exception);
2511 } while (exception.retry);
2512 return err;
2513}
2514
ec06c096 2515static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2516{
ec06c096 2517 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2518
9e33bed5 2519 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2520 rpc_restart_call(task);
ec06c096 2521 return -EAGAIN;
1da177e4 2522 }
8850df99
TM		 2523
2524 nfs_invalidate_atime(data->inode);
1da177e4 2525 if (task->tk_status > 0)
ec06c096
TM		 2526 renew_lease(server, data->timestamp);
2527 return 0;
1da177e4
LT		 2528}
2529
bdc7f021 2530static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2531{
1da177e4 2532 data->timestamp = jiffies;
bdc7f021 2533 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2534}
2535
788e7a89 2536static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2537{
1da177e4
LT		 2538 struct inode *inode = data->inode;
2539
9e33bed5 2540 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2541 rpc_restart_call(task);
788e7a89 2542 return -EAGAIN;
1da177e4 2543 }
4f9838c7 2544 if (task->tk_status >= 0) {
1da177e4 2545 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2546 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2547 }
788e7a89 2548 return 0;
1da177e4
LT		 2549}
2550
bdc7f021 2551static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2552{
bdc7f021
TM		 2553 struct nfs_server *server = NFS_SERVER(data->inode);
2554
4f9838c7
TM		 2555 data->args.bitmask = server->attr_bitmask;
2556 data->res.server = server;
1da177e4
LT		 2557 data->timestamp = jiffies;
2558
bdc7f021 2559 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2560}
2561
788e7a89 2562static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2563{
1da177e4
LT		 2564 struct inode *inode = data->inode;
2565
9e33bed5 2566 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2567 rpc_restart_call(task);
788e7a89 2568 return -EAGAIN;
1da177e4 2569 }
9e08a3c5 2570 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2571 return 0;
1da177e4
LT		 2572}
2573
bdc7f021 2574static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2575{
788e7a89 2576 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2577
4f9838c7
TM		 2578 data->args.bitmask = server->attr_bitmask;
2579 data->res.server = server;
bdc7f021 2580 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2581}
2582
2583/*
2584 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2585 * standalone procedure for queueing an asynchronous RENEW.
2586 */
963d8fe5 2587static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2588{
adfa6f98 2589 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2590 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2591
2592 if (task->tk_status < 0) {
2593 switch (task->tk_status) {
2594 case -NFS4ERR_STALE_CLIENTID:
2595 case -NFS4ERR_EXPIRED:
2596 case -NFS4ERR_CB_PATH_DOWN:
2597 nfs4_schedule_state_recovery(clp);
2598 }
2599 return;
2600 }
2601 spin_lock(&clp->cl_lock);
2602 if (time_before(clp->cl_last_renewal,timestamp))
2603 clp->cl_last_renewal = timestamp;
2604 spin_unlock(&clp->cl_lock);
2605}
2606
963d8fe5
TM		 2607static const struct rpc_call_ops nfs4_renew_ops = {
2608 .rpc_call_done = nfs4_renew_done,
2609};
2610
adfa6f98 2611int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2612{
2613 struct rpc_message msg = {
2614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2615 .rpc_argp = clp,
b4454fe1 2616 .rpc_cred = cred,
1da177e4
LT		 2617 };
2618
2619 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2620 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2621}
2622
adfa6f98 2623int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2624{
2625 struct rpc_message msg = {
2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2627 .rpc_argp = clp,
b4454fe1 2628 .rpc_cred = cred,
1da177e4
LT		 2629 };
2630 unsigned long now = jiffies;
2631 int status;
2632
2633 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2634 if (status < 0)
2635 return status;
2636 spin_lock(&clp->cl_lock);
2637 if (time_before(clp->cl_last_renewal,now))
2638 clp->cl_last_renewal = now;
2639 spin_unlock(&clp->cl_lock);
2640 return 0;
2641}
2642
aa1870af
BF		 2643static inline int nfs4_server_supports_acls(struct nfs_server *server)
2644{
2645 return (server->caps & NFS_CAP_ACLS)
2646 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2647 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2648}
2649
2650/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2651 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2652 * the stack.
2653 */
2654#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2655
2656static void buf_to_pages(const void *buf, size_t buflen,
2657 struct page **pages, unsigned int *pgbase)
2658{
2659 const void *p = buf;
2660
2661 *pgbase = offset_in_page(buf);
2662 p -= *pgbase;
2663 while (p < buf + buflen) {
2664 *(pages++) = virt_to_page(p);
2665 p += PAGE_CACHE_SIZE;
2666 }
2667}
2668
e50a1c2e
BF		 2669struct nfs4_cached_acl {
2670 int cached;
2671 size_t len;
3e9d4154 2672 char data[0];
e50a1c2e
BF		 2673};
2674
2675static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2676{
2677 struct nfs_inode *nfsi = NFS_I(inode);
2678
2679 spin_lock(&inode->i_lock);
2680 kfree(nfsi->nfs4_acl);
2681 nfsi->nfs4_acl = acl;
2682 spin_unlock(&inode->i_lock);
2683}
2684
2685static void nfs4_zap_acl_attr(struct inode *inode)
2686{
2687 nfs4_set_cached_acl(inode, NULL);
2688}
2689
2690static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2691{
2692 struct nfs_inode *nfsi = NFS_I(inode);
2693 struct nfs4_cached_acl *acl;
2694 int ret = -ENOENT;
2695
2696 spin_lock(&inode->i_lock);
2697 acl = nfsi->nfs4_acl;
2698 if (acl == NULL)
2699 goto out;
2700 if (buf == NULL) /* user is just asking for length */
2701 goto out_len;
2702 if (acl->cached == 0)
2703 goto out;
2704 ret = -ERANGE; /* see getxattr(2) man page */
2705 if (acl->len > buflen)
2706 goto out;
2707 memcpy(buf, acl->data, acl->len);
2708out_len:
2709 ret = acl->len;
2710out:
2711 spin_unlock(&inode->i_lock);
2712 return ret;
2713}
2714
2715static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2716{
2717 struct nfs4_cached_acl *acl;
2718
2719 if (buf && acl_len <= PAGE_SIZE) {
2720 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2721 if (acl == NULL)
2722 goto out;
2723 acl->cached = 1;
2724 memcpy(acl->data, buf, acl_len);
2725 } else {
2726 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2727 if (acl == NULL)
2728 goto out;
2729 acl->cached = 0;
2730 }
2731 acl->len = acl_len;
2732out:
2733 nfs4_set_cached_acl(inode, acl);
2734}
2735
16b4289c 2736static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2737{
aa1870af
BF		 2738 struct page *pages[NFS4ACL_MAXPAGES];
2739 struct nfs_getaclargs args = {
2740 .fh = NFS_FH(inode),
2741 .acl_pages = pages,
2742 .acl_len = buflen,
2743 };
2744 size_t resp_len = buflen;
e50a1c2e 2745 void *resp_buf;
aa1870af
BF		 2746 struct rpc_message msg = {
2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2748 .rpc_argp = &args,
2749 .rpc_resp = &resp_len,
2750 };
e50a1c2e 2751 struct page *localpage = NULL;
aa1870af
BF		 2752 int ret;
2753
e50a1c2e
BF		 2754 if (buflen < PAGE_SIZE) {
2755 /* As long as we're doing a round trip to the server anyway,
2756 * let's be prepared for a page of acl data. */
2757 localpage = alloc_page(GFP_KERNEL);
2758 resp_buf = page_address(localpage);
2759 if (localpage == NULL)
2760 return -ENOMEM;
2761 args.acl_pages[0] = localpage;
2762 args.acl_pgbase = 0;
1d95db8e 2763 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2764 } else {
2765 resp_buf = buf;
2766 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2767 }
aa1870af 2768 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2769 if (ret)
2770 goto out_free;
2771 if (resp_len > args.acl_len)
2772 nfs4_write_cached_acl(inode, NULL, resp_len);
2773 else
2774 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2775 if (buf) {
2776 ret = -ERANGE;
2777 if (resp_len > buflen)
2778 goto out_free;
2779 if (localpage)
2780 memcpy(buf, resp_buf, resp_len);
2781 }
2782 ret = resp_len;
2783out_free:
2784 if (localpage)
2785 __free_page(localpage);
aa1870af
BF		 2786 return ret;
2787}
2788
16b4289c
TM		 2789static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2790{
2791 struct nfs4_exception exception = { };
2792 ssize_t ret;
2793 do {
2794 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2795 if (ret >= 0)
2796 break;
2797 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2798 } while (exception.retry);
2799 return ret;
2800}
2801
e50a1c2e
BF		 2802static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2803{
2804 struct nfs_server *server = NFS_SERVER(inode);
2805 int ret;
2806
2807 if (!nfs4_server_supports_acls(server))
2808 return -EOPNOTSUPP;
2809 ret = nfs_revalidate_inode(server, inode);
2810 if (ret < 0)
2811 return ret;
f41f7418
TM		 2812 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2813 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2814 ret = nfs4_read_cached_acl(inode, buf, buflen);
2815 if (ret != -ENOENT)
2816 return ret;
2817 return nfs4_get_acl_uncached(inode, buf, buflen);
2818}
2819
16b4289c 2820static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2821{
2822 struct nfs_server *server = NFS_SERVER(inode);
2823 struct page *pages[NFS4ACL_MAXPAGES];
2824 struct nfs_setaclargs arg = {
2825 .fh = NFS_FH(inode),
2826 .acl_pages = pages,
2827 .acl_len = buflen,
2828 };
2829 struct rpc_message msg = {
2830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2831 .rpc_argp = &arg,
2832 .rpc_resp = NULL,
2833 };
2834 int ret;
2835
2836 if (!nfs4_server_supports_acls(server))
2837 return -EOPNOTSUPP;
642ac549 2838 nfs_inode_return_delegation(inode);
4b580ee3 2839 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2840 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
f41f7418
TM		 2841 nfs_access_zap_cache(inode);
2842 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2843 return ret;
2844}
2845
16b4289c
TM		 2846static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
2850 do {
2851 err = nfs4_handle_exception(NFS_SERVER(inode),
2852 __nfs4_proc_set_acl(inode, buf, buflen),
2853 &exception);
2854 } while (exception.retry);
2855 return err;
2856}
2857
1da177e4 2858static int
9e33bed5 2859nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 2860{
7539bbab 2861 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2862
2863 if (!clp || task->tk_status >= 0)
2864 return 0;
2865 switch(task->tk_status) {
9e33bed5
TM		 2866 case -NFS4ERR_ADMIN_REVOKED:
2867 case -NFS4ERR_BAD_STATEID:
2868 case -NFS4ERR_OPENMODE:
2869 if (state == NULL)
2870 break;
2871 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 2872 case -NFS4ERR_STALE_CLIENTID:
2873 case -NFS4ERR_STALE_STATEID:
2874 case -NFS4ERR_EXPIRED:
5d00837b 2875 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2876 nfs4_schedule_state_recovery(clp);
e005e804 2877 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 2878 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2879 task->tk_status = 0;
2880 return -EAGAIN;
1da177e4 2881 case -NFS4ERR_DELAY:
2e96d286 2882 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2883 case -NFS4ERR_GRACE:
1da177e4
LT		 2884 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2885 task->tk_status = 0;
2886 return -EAGAIN;
2887 case -NFS4ERR_OLD_STATEID:
2888 task->tk_status = 0;
2889 return -EAGAIN;
2890 }
2891 task->tk_status = nfs4_map_errors(task->tk_status);
2892 return 0;
2893}
2894
adfa6f98 2895int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2896{
2897 nfs4_verifier sc_verifier;
2898 struct nfs4_setclientid setclientid = {
2899 .sc_verifier = &sc_verifier,
2900 .sc_prog = program,
2901 };
2902 struct rpc_message msg = {
2903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2904 .rpc_argp = &setclientid,
2905 .rpc_resp = clp,
286d7d6a 2906 .rpc_cred = cred,
1da177e4 2907 };
bc4785cd 2908 __be32 *p;
1da177e4
LT		 2909 int loop = 0;
2910 int status;
2911
bc4785cd 2912 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2913 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2914 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2915
2916 for(;;) {
2917 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2918 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2919 clp->cl_ipaddr,
2920 rpc_peeraddr2str(clp->cl_rpcclient,
2921 RPC_DISPLAY_ADDR),
69dd716c
TM		 2922 rpc_peeraddr2str(clp->cl_rpcclient,
2923 RPC_DISPLAY_PROTO),
78ea323b 2924 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2925 clp->cl_id_uniquifier);
2926 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2927 sizeof(setclientid.sc_netid),
2928 rpc_peeraddr2str(clp->cl_rpcclient,
2929 RPC_DISPLAY_NETID));
1da177e4 2930 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2931 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2932 clp->cl_ipaddr, port >> 8, port & 255);
2933
2934 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2935 if (status != -NFS4ERR_CLID_INUSE)
2936 break;
2937 if (signalled())
2938 break;
2939 if (loop++ & 1)
2940 ssleep(clp->cl_lease_time + 1);
2941 else
2942 if (++clp->cl_id_uniquifier == 0)
2943 break;
2944 }
2945 return status;
2946}
2947
adfa6f98 2948static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2949{
2950 struct nfs_fsinfo fsinfo;
2951 struct rpc_message msg = {
2952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2953 .rpc_argp = clp,
2954 .rpc_resp = &fsinfo,
286d7d6a 2955 .rpc_cred = cred,
1da177e4
LT		 2956 };
2957 unsigned long now;
2958 int status;
2959
2960 now = jiffies;
2961 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2962 if (status == 0) {
2963 spin_lock(&clp->cl_lock);
2964 clp->cl_lease_time = fsinfo.lease_time * HZ;
2965 clp->cl_last_renewal = now;
2966 spin_unlock(&clp->cl_lock);
2967 }
2968 return status;
2969}
2970
adfa6f98 2971int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 2972{
77e03677 2973 long timeout = 0;
51581f3b
TM		 2974 int err;
2975 do {
2976 err = _nfs4_proc_setclientid_confirm(clp, cred);
2977 switch (err) {
2978 case 0:
2979 return err;
2980 case -NFS4ERR_RESOURCE:
2981 /* The IBM lawyers misread another document! */
2982 case -NFS4ERR_DELAY:
2983 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2984 }
2985 } while (err == 0);
2986 return err;
2987}
2988
fe650407
TM		 2989struct nfs4_delegreturndata {
2990 struct nfs4_delegreturnargs args;
fa178f29 2991 struct nfs4_delegreturnres res;
fe650407
TM		 2992 struct nfs_fh fh;
2993 nfs4_stateid stateid;
26e976a8 2994 unsigned long timestamp;
fa178f29 2995 struct nfs_fattr fattr;
fe650407
TM		 2996 int rpc_status;
2997};
2998
fe650407
TM		 2999static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3000{
3001 struct nfs4_delegreturndata *data = calldata;
3002 data->rpc_status = task->tk_status;
26e976a8 3003 if (data->rpc_status == 0)
fa178f29 3004 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3005}
3006
3007static void nfs4_delegreturn_release(void *calldata)
3008{
fe650407
TM		 3009 kfree(calldata);
3010}
3011
c8d149f3 3012static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3013 .rpc_call_done = nfs4_delegreturn_done,
3014 .rpc_release = nfs4_delegreturn_release,
3015};
3016
e6f81075 3017static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3018{
3019 struct nfs4_delegreturndata *data;
fa178f29 3020 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3021 struct rpc_task *task;
5138fde0
TM		 3022 struct rpc_message msg = {
3023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3024 .rpc_cred = cred,
3025 };
c970aa85
TM		 3026 struct rpc_task_setup task_setup_data = {
3027 .rpc_client = server->client,
5138fde0 3028 .rpc_message = &msg,
c970aa85
TM		 3029 .callback_ops = &nfs4_delegreturn_ops,
3030 .flags = RPC_TASK_ASYNC,
3031 };
e6f81075 3032 int status = 0;
fe650407
TM		 3033
3034 data = kmalloc(sizeof(*data), GFP_KERNEL);
3035 if (data == NULL)
3036 return -ENOMEM;
3037 data->args.fhandle = &data->fh;
3038 data->args.stateid = &data->stateid;
fa178f29 3039 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3040 nfs_copy_fh(&data->fh, NFS_FH(inode));
3041 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3042 data->res.fattr = &data->fattr;
3043 data->res.server = server;
5138fde0 3044 nfs_fattr_init(data->res.fattr);
26e976a8 3045 data->timestamp = jiffies;
fe650407
TM		 3046 data->rpc_status = 0;
3047
c970aa85 3048 task_setup_data.callback_data = data;
5138fde0
TM		 3049 msg.rpc_argp = &data->args,
3050 msg.rpc_resp = &data->res,
c970aa85 3051 task = rpc_run_task(&task_setup_data);
7a1218a2 3052 if (IS_ERR(task))
fe650407 3053 return PTR_ERR(task);
e6f81075
TM		 3054 if (!issync)
3055 goto out;
fe650407 3056 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3057 if (status != 0)
3058 goto out;
3059 status = data->rpc_status;
3060 if (status != 0)
3061 goto out;
3062 nfs_refresh_inode(inode, &data->fattr);
3063out:
e6b3c4db 3064 rpc_put_task(task);
fe650407 3065 return status;
1da177e4
LT		 3066}
3067
e6f81075 3068int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3069{
3070 struct nfs_server *server = NFS_SERVER(inode);
3071 struct nfs4_exception exception = { };
3072 int err;
3073 do {
e6f81075 3074 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3075 switch (err) {
3076 case -NFS4ERR_STALE_STATEID:
3077 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3078 case 0:
3079 return 0;
3080 }
3081 err = nfs4_handle_exception(server, err, &exception);
3082 } while (exception.retry);
3083 return err;
3084}
3085
3086#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3087#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3088
3089/*
3090 * sleep, with exponential backoff, and retry the LOCK operation.
3091 */
3092static unsigned long
3093nfs4_set_lock_task_retry(unsigned long timeout)
3094{
150030b7 3095 schedule_timeout_killable(timeout);
1da177e4
LT		 3096 timeout <<= 1;
3097 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3098 return NFS4_LOCK_MAXTIMEOUT;
3099 return timeout;
3100}
3101
1da177e4
LT		 3102static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3103{
3104 struct inode *inode = state->inode;
3105 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3106 struct nfs_client *clp = server->nfs_client;
911d1aaf 3107 struct nfs_lockt_args arg = {
1da177e4 3108 .fh = NFS_FH(inode),
911d1aaf 3109 .fl = request,
1da177e4 3110 };
911d1aaf
TM		 3111 struct nfs_lockt_res res = {
3112 .denied = request,
1da177e4
LT		 3113 };
3114 struct rpc_message msg = {
3115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3116 .rpc_argp = &arg,
3117 .rpc_resp = &res,
3118 .rpc_cred = state->owner->so_cred,
3119 };
1da177e4
LT		 3120 struct nfs4_lock_state *lsp;
3121 int status;
3122
911d1aaf 3123 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3124 status = nfs4_set_lock_state(state, request);
3125 if (status != 0)
3126 goto out;
3127 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3128 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3129 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3130 switch (status) {
3131 case 0:
3132 request->fl_type = F_UNLCK;
3133 break;
3134 case -NFS4ERR_DENIED:
3135 status = 0;
1da177e4 3136 }
70cc6487 3137 request->fl_ops->fl_release_private(request);
8d0a8a9d 3138out:
1da177e4
LT		 3139 return status;
3140}
3141
3142static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3143{
3144 struct nfs4_exception exception = { };
3145 int err;
3146
3147 do {
3148 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3149 _nfs4_proc_getlk(state, cmd, request),
3150 &exception);
3151 } while (exception.retry);
3152 return err;
3153}
3154
3155static int do_vfs_lock(struct file *file, struct file_lock *fl)
3156{
3157 int res = 0;
3158 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3159 case FL_POSIX:
3160 res = posix_lock_file_wait(file, fl);
3161 break;
3162 case FL_FLOCK:
3163 res = flock_lock_file_wait(file, fl);
3164 break;
3165 default:
3166 BUG();
3167 }
1da177e4
LT		 3168 return res;
3169}
3170
faf5f49c 3171struct nfs4_unlockdata {
911d1aaf
TM		 3172 struct nfs_locku_args arg;
3173 struct nfs_locku_res res;
faf5f49c
TM		 3174 struct nfs4_lock_state *lsp;
3175 struct nfs_open_context *ctx;
911d1aaf
TM		 3176 struct file_lock fl;
3177 const struct nfs_server *server;
26e976a8 3178 unsigned long timestamp;
faf5f49c
TM		 3179};
3180
911d1aaf
TM		 3181static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3182 struct nfs_open_context *ctx,
3183 struct nfs4_lock_state *lsp,
3184 struct nfs_seqid *seqid)
3185{
3186 struct nfs4_unlockdata *p;
3187 struct inode *inode = lsp->ls_state->inode;
3188
3189 p = kmalloc(sizeof(*p), GFP_KERNEL);
3190 if (p == NULL)
3191 return NULL;
3192 p->arg.fh = NFS_FH(inode);
3193 p->arg.fl = &p->fl;
3194 p->arg.seqid = seqid;
c1d51931 3195 p->res.seqid = seqid;
911d1aaf
TM		 3196 p->arg.stateid = &lsp->ls_stateid;
3197 p->lsp = lsp;
3198 atomic_inc(&lsp->ls_count);
3199 /* Ensure we don't close file until we're done freeing locks! */
3200 p->ctx = get_nfs_open_context(ctx);
3201 memcpy(&p->fl, fl, sizeof(p->fl));
3202 p->server = NFS_SERVER(inode);
3203 return p;
3204}
3205
06f814a3 3206static void nfs4_locku_release_calldata(void *data)
faf5f49c 3207{
963d8fe5 3208 struct nfs4_unlockdata *calldata = data;
911d1aaf 3209 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3210 nfs4_put_lock_state(calldata->lsp);
3211 put_nfs_open_context(calldata->ctx);
3212 kfree(calldata);
faf5f49c
TM		 3213}
3214
963d8fe5 3215static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3216{
963d8fe5 3217 struct nfs4_unlockdata *calldata = data;
faf5f49c 3218
06f814a3
TM		 3219 if (RPC_ASSASSINATED(task))
3220 return;
faf5f49c
TM		 3221 switch (task->tk_status) {
3222 case 0:
3223 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3224 calldata->res.stateid.data,
faf5f49c 3225 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3226 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3227 break;
9e33bed5
TM		 3228 case -NFS4ERR_BAD_STATEID:
3229 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3230 case -NFS4ERR_STALE_STATEID:
3231 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3232 break;
3233 default:
9e33bed5 3234 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3235 rpc_restart_call(task);
faf5f49c 3236 }
faf5f49c
TM		 3237}
3238
4ce70ada 3239static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3240{
4ce70ada 3241 struct nfs4_unlockdata *calldata = data;
faf5f49c 3242
911d1aaf 3243 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3244 return;
3245 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3246 /* Note: exit _without_ running nfs4_locku_done */
3247 task->tk_action = NULL;
faf5f49c
TM		 3248 return;
3249 }
26e976a8 3250 calldata->timestamp = jiffies;
5138fde0 3251 rpc_call_start(task);
faf5f49c
TM		 3252}
3253
963d8fe5 3254static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3255 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3256 .rpc_call_done = nfs4_locku_done,
06f814a3 3257 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3258};
3259
a5d16a4d
TM		 3260static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3261 struct nfs_open_context *ctx,
3262 struct nfs4_lock_state *lsp,
3263 struct nfs_seqid *seqid)
3264{
3265 struct nfs4_unlockdata *data;
5138fde0
TM		 3266 struct rpc_message msg = {
3267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3268 .rpc_cred = ctx->cred,
3269 };
c970aa85
TM		 3270 struct rpc_task_setup task_setup_data = {
3271 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3272 .rpc_message = &msg,
c970aa85 3273 .callback_ops = &nfs4_locku_ops,
101070ca 3274 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3275 .flags = RPC_TASK_ASYNC,
3276 };
a5d16a4d 3277
137d6aca
FF		 3278 /* Ensure this is an unlock - when canceling a lock, the
3279 * canceled lock is passed in, and it won't be an unlock.
3280 */
3281 fl->fl_type = F_UNLCK;
3282
a5d16a4d
TM		 3283 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3284 if (data == NULL) {
3285 nfs_free_seqid(seqid);
3286 return ERR_PTR(-ENOMEM);
3287 }
3288
5138fde0
TM		 3289 msg.rpc_argp = &data->arg,
3290 msg.rpc_resp = &data->res,
c970aa85
TM		 3291 task_setup_data.callback_data = data;
3292 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3293}
3294
faf5f49c
TM		 3295static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3296{
19e03c57 3297 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3298 struct nfs_seqid *seqid;
1da177e4 3299 struct nfs4_lock_state *lsp;
06f814a3
TM		 3300 struct rpc_task *task;
3301 int status = 0;
536ff0f8 3302 unsigned char fl_flags = request->fl_flags;
faf5f49c 3303
8d0a8a9d 3304 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3305 /* Unlock _before_ we do the RPC call */
3306 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3307 down_read(&nfsi->rwsem);
3308 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3309 up_read(&nfsi->rwsem);
9b073574 3310 goto out;
19e03c57
TM		 3311 }
3312 up_read(&nfsi->rwsem);
8d0a8a9d 3313 if (status != 0)
9b073574
TM		 3314 goto out;
3315 /* Is this a delegated lock? */
3316 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3317 goto out;
8d0a8a9d 3318 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3319 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3320 status = -ENOMEM;
911d1aaf 3321 if (seqid == NULL)
9b073574 3322 goto out;
cd3758e3 3323 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3324 status = PTR_ERR(task);
3325 if (IS_ERR(task))
9b073574 3326 goto out;
a5d16a4d 3327 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3328 rpc_put_task(task);
9b073574 3329out:
536ff0f8 3330 request->fl_flags = fl_flags;
1da177e4
LT		 3331 return status;
3332}
3333
a5d16a4d
TM		 3334struct nfs4_lockdata {
3335 struct nfs_lock_args arg;
3336 struct nfs_lock_res res;
3337 struct nfs4_lock_state *lsp;
3338 struct nfs_open_context *ctx;
3339 struct file_lock fl;
26e976a8 3340 unsigned long timestamp;
a5d16a4d
TM		 3341 int rpc_status;
3342 int cancelled;
3343};
3344
3345static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3346 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3347{
a5d16a4d
TM		 3348 struct nfs4_lockdata *p;
3349 struct inode *inode = lsp->ls_state->inode;
1da177e4 3350 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3351
3352 p = kzalloc(sizeof(*p), GFP_KERNEL);
3353 if (p == NULL)
3354 return NULL;
3355
3356 p->arg.fh = NFS_FH(inode);
3357 p->arg.fl = &p->fl;
2f74c0a0
TM		 3358 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3359 if (p->arg.open_seqid == NULL)
3360 goto out_free;
a5d16a4d
TM		 3361 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3362 if (p->arg.lock_seqid == NULL)
2f74c0a0 3363 goto out_free_seqid;
a5d16a4d 3364 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3365 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3366 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3367 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3368 p->lsp = lsp;
3369 atomic_inc(&lsp->ls_count);
3370 p->ctx = get_nfs_open_context(ctx);
3371 memcpy(&p->fl, fl, sizeof(p->fl));
3372 return p;
2f74c0a0
TM		 3373out_free_seqid:
3374 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3375out_free:
3376 kfree(p);
3377 return NULL;
3378}
3379
3380static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3381{
3382 struct nfs4_lockdata *data = calldata;
3383 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3384
3110ff80 3385 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3386 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3387 return;
a5d16a4d
TM		 3388 /* Do we need to do an open_to_lock_owner? */
3389 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3390 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3391 return;
a5d16a4d
TM		 3392 data->arg.open_stateid = &state->stateid;
3393 data->arg.new_lock_owner = 1;
c1d51931 3394 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3395 } else
3396 data->arg.new_lock_owner = 0;
26e976a8 3397 data->timestamp = jiffies;
5138fde0 3398 rpc_call_start(task);
3110ff80 3399 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3400}
3401
3402static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3403{
3404 struct nfs4_lockdata *data = calldata;
3405
3110ff80 3406 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3407
3408 data->rpc_status = task->tk_status;
3409 if (RPC_ASSASSINATED(task))
3410 goto out;
3411 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3412 if (data->rpc_status == 0)
3413 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3414 else
3415 goto out;
3416 }
3417 if (data->rpc_status == 0) {
3418 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3419 sizeof(data->lsp->ls_stateid.data));
3420 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3421 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3422 }
a5d16a4d 3423out:
3110ff80 3424 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3425}
3426
3427static void nfs4_lock_release(void *calldata)
3428{
3429 struct nfs4_lockdata *data = calldata;
3430
3110ff80 3431 dprintk("%s: begin!\n", __func__);
2f74c0a0 3432 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3433 if (data->cancelled != 0) {
3434 struct rpc_task *task;
3435 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3436 data->arg.lock_seqid);
3437 if (!IS_ERR(task))
e6b3c4db 3438 rpc_put_task(task);
3110ff80 3439 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3440 } else
3441 nfs_free_seqid(data->arg.lock_seqid);
3442 nfs4_put_lock_state(data->lsp);
3443 put_nfs_open_context(data->ctx);
3444 kfree(data);
3110ff80 3445 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3446}
3447
3448static const struct rpc_call_ops nfs4_lock_ops = {
3449 .rpc_call_prepare = nfs4_lock_prepare,
3450 .rpc_call_done = nfs4_lock_done,
3451 .rpc_release = nfs4_lock_release,
3452};
3453
3454static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3455{
3456 struct nfs4_lockdata *data;
3457 struct rpc_task *task;
5138fde0
TM		 3458 struct rpc_message msg = {
3459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3460 .rpc_cred = state->owner->so_cred,
3461 };
c970aa85
TM		 3462 struct rpc_task_setup task_setup_data = {
3463 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3464 .rpc_message = &msg,
c970aa85 3465 .callback_ops = &nfs4_lock_ops,
101070ca 3466 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3467 .flags = RPC_TASK_ASYNC,
3468 };
a5d16a4d
TM		 3469 int ret;
3470
3110ff80 3471 dprintk("%s: begin!\n", __func__);
cd3758e3 3472 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3473 fl->fl_u.nfs4_fl.owner);
3474 if (data == NULL)
3475 return -ENOMEM;
3476 if (IS_SETLKW(cmd))
3477 data->arg.block = 1;
3478 if (reclaim != 0)
3479 data->arg.reclaim = 1;
5138fde0
TM		 3480 msg.rpc_argp = &data->arg,
3481 msg.rpc_resp = &data->res,
c970aa85
TM		 3482 task_setup_data.callback_data = data;
3483 task = rpc_run_task(&task_setup_data);
7a1218a2 3484 if (IS_ERR(task))
a5d16a4d 3485 return PTR_ERR(task);
a5d16a4d
TM		 3486 ret = nfs4_wait_for_completion_rpc_task(task);
3487 if (ret == 0) {
3488 ret = data->rpc_status;
3489 if (ret == -NFS4ERR_DENIED)
3490 ret = -EAGAIN;
3491 } else
3492 data->cancelled = 1;
e6b3c4db 3493 rpc_put_task(task);
3110ff80 3494 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3495 return ret;
1da177e4
LT		 3496}
3497
3498static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3499{
202b50dc
TM		 3500 struct nfs_server *server = NFS_SERVER(state->inode);
3501 struct nfs4_exception exception = { };
3502 int err;
3503
3504 do {
42a2d13e
TM		 3505 /* Cache the lock if possible... */
3506 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3507 return 0;
202b50dc
TM		 3508 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3509 if (err != -NFS4ERR_DELAY)
3510 break;
3511 nfs4_handle_exception(server, err, &exception);
3512 } while (exception.retry);
3513 return err;
1da177e4
LT		 3514}
3515
3516static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3517{
202b50dc
TM		 3518 struct nfs_server *server = NFS_SERVER(state->inode);
3519 struct nfs4_exception exception = { };
3520 int err;
3521
6bfc93ef
TM		 3522 err = nfs4_set_lock_state(state, request);
3523 if (err != 0)
3524 return err;
202b50dc 3525 do {
42a2d13e
TM		 3526 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3527 return 0;
202b50dc
TM		 3528 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3529 if (err != -NFS4ERR_DELAY)
3530 break;
3531 nfs4_handle_exception(server, err, &exception);
3532 } while (exception.retry);
3533 return err;
1da177e4
LT		 3534}
3535
3536static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3537{
19e03c57 3538 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3539 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3540 int status;
3541
6bfc93ef 3542 /* Is this a delegated open? */
6bfc93ef
TM		 3543 status = nfs4_set_lock_state(state, request);
3544 if (status != 0)
3545 goto out;
01c3b861
TM		 3546 request->fl_flags |= FL_ACCESS;
3547 status = do_vfs_lock(request->fl_file, request);
3548 if (status < 0)
3549 goto out;
19e03c57 3550 down_read(&nfsi->rwsem);
01c3b861 3551 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3552 /* Yes: cache locks! */
01c3b861 3553 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3554 request->fl_flags = fl_flags & ~FL_SLEEP;
3555 status = do_vfs_lock(request->fl_file, request);
3556 goto out_unlock;
01c3b861 3557 }
6bfc93ef
TM		 3558 status = _nfs4_do_setlk(state, cmd, request, 0);
3559 if (status != 0)
01c3b861 3560 goto out_unlock;
6bfc93ef 3561 /* Note: we always want to sleep here! */
01c3b861 3562 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3563 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3564 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3565out_unlock:
19e03c57 3566 up_read(&nfsi->rwsem);
01c3b861
TM		 3567out:
3568 request->fl_flags = fl_flags;
1da177e4
LT		 3569 return status;
3570}
3571
3572static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3573{
3574 struct nfs4_exception exception = { };
3575 int err;
3576
3577 do {
3578 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3579 _nfs4_proc_setlk(state, cmd, request),
3580 &exception);
3581 } while (exception.retry);
3582 return err;
3583}
3584
3585static int
3586nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3587{
3588 struct nfs_open_context *ctx;
3589 struct nfs4_state *state;
3590 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3591 int status;
3592
3593 /* verify open state */
cd3758e3 3594 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3595 state = ctx->state;
3596
3597 if (request->fl_start < 0 || request->fl_end < 0)
3598 return -EINVAL;
3599
3600 if (IS_GETLK(cmd))
3601 return nfs4_proc_getlk(state, F_GETLK, request);
3602
3603 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3604 return -EINVAL;
3605
3606 if (request->fl_type == F_UNLCK)
3607 return nfs4_proc_unlck(state, cmd, request);
3608
3609 do {
3610 status = nfs4_proc_setlk(state, cmd, request);
3611 if ((status != -EAGAIN) || IS_SETLK(cmd))
3612 break;
3613 timeout = nfs4_set_lock_task_retry(timeout);
3614 status = -ERESTARTSYS;
3615 if (signalled())
3616 break;
3617 } while(status < 0);
1da177e4
LT		 3618 return status;
3619}
3620
888e694c
TM		 3621int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3622{
3623 struct nfs_server *server = NFS_SERVER(state->inode);
3624 struct nfs4_exception exception = { };
3625 int err;
3626
3627 err = nfs4_set_lock_state(state, fl);
3628 if (err != 0)
3629 goto out;
3630 do {
3631 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3632 if (err != -NFS4ERR_DELAY)
3633 break;
3634 err = nfs4_handle_exception(server, err, &exception);
3635 } while (exception.retry);
3636out:
3637 return err;
3638}
6b3b5496 3639
aa1870af
BF		 3640#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3641
6b3b5496
BF		 3642int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3643 size_t buflen, int flags)
3644{
4b580ee3
BF		 3645 struct inode *inode = dentry->d_inode;
3646
3647 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3648 return -EOPNOTSUPP;
3649
4b580ee3 3650 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3651}
3652
3653/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3654 * and that's what we'll do for e.g. user attributes that haven't been set.
3655 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3656 * attributes in kernel-managed attribute namespaces. */
3657ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3658 size_t buflen)
3659{
aa1870af
BF		 3660 struct inode *inode = dentry->d_inode;
3661
3662 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3663 return -EOPNOTSUPP;
3664
3665 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3666}
3667
3668ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3669{
aa1870af 3670 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3671
096455a2
BF		 3672 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3673 return 0;
6b3b5496
BF		 3674 if (buf && buflen < len)
3675 return -ERANGE;
3676 if (buf)
aa1870af
BF		 3677 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3678 return len;
6b3b5496
BF		 3679}
3680
56659e99 3681int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3682 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3683{
3684 struct nfs_server *server = NFS_SERVER(dir);
3685 u32 bitmask[2] = {
361e624f
MN		 3686 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3687 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3688 };
3689 struct nfs4_fs_locations_arg args = {
3690 .dir_fh = NFS_FH(dir),
c228fd3a 3691 .name = name,
683b57b4
TM		 3692 .page = page,
3693 .bitmask = bitmask,
3694 };
3695 struct rpc_message msg = {
3696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3697 .rpc_argp = &args,
7aaa0b3b 3698 .rpc_resp = fs_locations,
683b57b4
TM		 3699 };
3700 int status;
3701
3110ff80 3702 dprintk("%s: start\n", __func__);
c228fd3a 3703 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3704 fs_locations->server = server;
830b8e33 3705 fs_locations->nlocations = 0;
683b57b4 3706 status = rpc_call_sync(server->client, &msg, 0);
3110ff80 3707 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3708 return status;
3709}
3710
1da177e4 3711struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 3712 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 3713 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 3714 .recover_open = nfs4_open_reclaim,
3715 .recover_lock = nfs4_lock_reclaim,
3716};
3717
b79a4a1b 3718struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 3719 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 3720 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 3721 .recover_open = nfs4_open_expired,
3722 .recover_lock = nfs4_lock_expired,
3723};
3724
92e1d5be 3725static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3726 .permission = nfs_permission,
3727 .getattr = nfs_getattr,
3728 .setattr = nfs_setattr,
3729 .getxattr = nfs4_getxattr,
3730 .setxattr = nfs4_setxattr,
3731 .listxattr = nfs4_listxattr,
3732};
3733
509de811 3734const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3735 .version = 4, /* protocol version */
3736 .dentry_ops = &nfs4_dentry_operations,
3737 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3738 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3739 .getroot = nfs4_proc_get_root,
3740 .getattr = nfs4_proc_getattr,
3741 .setattr = nfs4_proc_setattr,
2b3de441 3742 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3743 .lookup = nfs4_proc_lookup,
3744 .access = nfs4_proc_access,
3745 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3746 .create = nfs4_proc_create,
3747 .remove = nfs4_proc_remove,
3748 .unlink_setup = nfs4_proc_unlink_setup,
3749 .unlink_done = nfs4_proc_unlink_done,
3750 .rename = nfs4_proc_rename,
3751 .link = nfs4_proc_link,
3752 .symlink = nfs4_proc_symlink,
3753 .mkdir = nfs4_proc_mkdir,
3754 .rmdir = nfs4_proc_remove,
3755 .readdir = nfs4_proc_readdir,
3756 .mknod = nfs4_proc_mknod,
3757 .statfs = nfs4_proc_statfs,
3758 .fsinfo = nfs4_proc_fsinfo,
3759 .pathconf = nfs4_proc_pathconf,
e9326dca 3760 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3761 .decode_dirent = nfs4_decode_dirent,
3762 .read_setup = nfs4_proc_read_setup,
ec06c096 3763 .read_done = nfs4_read_done,
1da177e4 3764 .write_setup = nfs4_proc_write_setup,
788e7a89 3765 .write_done = nfs4_write_done,
1da177e4 3766 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3767 .commit_done = nfs4_commit_done,
1da177e4 3768 .lock = nfs4_proc_lock,
e50a1c2e 3769 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3770};
3771
3772/*
3773 * Local variables:
3774 * c-basic-offset: 8
3775 * End:
3776 */
kernel source for telekom puls (alcatel/mediatek)